All Tools
Calculators for home projects, school, cars, personal finance, business and creators.
Home Project Toolkit
Materials, measurements and costs for your next project.
Paint & Walls
Paint Color Coverage
Plan coats for a color change. Compare the lightness of old and new colors, then allow a range for paint opacity and primer.
Paint Finish Picker
Choose a practical starting finish for a room. Match the surface and priority to a common finish. Product specifications matter more than a general rule.
Paint Leftover
See how far remaining paint may go. Convert quarts to gallons and divide total coverage by the number of coats.
Baseboard / Trim
Estimate linear trim and full pieces. Start with room perimeter, subtract openings, add waste, then round up full pieces.
Wallpaper Roll
Estimate rolls with pattern repeat. Round required strips by roll width. Round strip length up to the repeat, then find strips per roll.
Accent Wall Size
Estimate paint and wallpaper for one wall. Multiply wall dimensions; divide by paint coverage and usable roll coverage.
Budget & Cost
Paint Can Cost
Estimate paint, primer and tax. Multiply gallons by each price, then apply tax to the material subtotal.
Project Budget Buffer
Add a contingency to a project budget. Use a planning contingency of 10%, 15%, 20% or 25% by project type, unless you enter your own rate.
DIY vs Contractor
Compare cash costs and optional time value. Add DIY materials and tools, optionally add hours times your chosen rate and compare to the quote.
Sales Tax + Material Cost
Find a hardware-store purchase total. Subtract the discount from materials, apply tax to the remainder, then add delivery. Tax treatment varies by location.
Material Shopping List
Combine material quantities in a project. Add the item to a selected project, then check it off when purchased.
Project Checklist
Use a short task template in a saved project. Choose a practical starter checklist, save it to a project and add your own tasks.
Floors & Tile
Tile Layout
Estimate full and cut tiles in a grid layout. Divide each dimension by tile plus grout gap; count full rows and columns, then edge positions.
Flooring Box
Round flooring up to full retail boxes. Add waste to room area, divide by box coverage and round up.
Flooring Direction
Compare common flooring direction choices. Suggest a board direction based on the chosen visual priority.
Measurements
Room Area
Add rectangular sections of an irregular room. Add the area of each rectangular section; avoid overlapping sections.
Fraction to Decimal
Convert a fraction to decimal inches. Divide numerator by denominator and add any whole number.
Feet + Inches
Add or subtract two measurements. Convert both measurements to inches, perform the operation, then convert back to feet and inches.
Measurement Converter
Convert length, area or volume units. Convert between units of the same dimension using exact standard factors.
Lumber & Construction
Wall Stud Estimate
Approximate studs for one straight wall. Divide wall length by spacing and add an end stud.
Board Foot
Calculate lumber board feet. Board feet equal thickness in inches × width in inches × length in feet ÷ 12, times quantity.
Lumber Cut Planner
Group cuts across stock boards. A best-fit decreasing heuristic places longer cuts first while allowing a saw kerf per piece.
Sheet Material
Estimate plywood, OSB or paneling sheets. Divide required area including waste by sheet area and round up.
Drywall Sheet
Estimate drywall sheets for walls and ceiling. Sum wall area and optional ceiling, subtract openings, then divide by sheet area with waste.
Drywall Compound
Plan an approximate joint compound amount. For new drywall, use roughly 9 gallons per 1,000 sq ft of 4 × 8 ft board as a midpoint and show a planning range; repairs vary.
Outdoor & Landscaping
Fence Post Spacing
Plan sections along a straight fence run. Round each run up to sections within the maximum spacing; allow two extra posts per gate opening.
Deck Board Gap
Estimate board count across a deck width. Divide the width by board face width plus gap and round up; edge trimming may change the result.
Paver
Count pavers for a patio or path. Divide area by paver face area, then add waste and round up.
Fire Pit Gravel
Estimate gravel for a ring around a pit. Use the area of the outer circle minus the pit circle, multiplied by depth.
Mulch Bag
Convert mulch volume to retail bags. Area × depth in feet gives cubic feet; divide by bag size and round up.
Soil Bag
Convert soil volume to retail bags. Area × depth in feet gives cubic feet; divide by bag size and round up.
Plant Spacing
Estimate plants for a rectangular bed. Place plant centers at roughly the chosen spacing, with half a spacing at edges. Staggered rows alternate offsets.
Grass Seed
Estimate seed weight and bag count. Multiply area in thousands of square feet by the seed rate.
Moving & Storage
Furniture Fit Checker
Check a first-pass path through openings. Compare furniture cross-section orientations to the narrowest opening with a small clearance allowance. Turning geometry still matters.
Moving Truck Size
Estimate a truck size range for a move. Combine room count, floor area and large items into a broad truck-length range.
Storage Unit Size
Estimate a storage unit starting size. Use home size, bedrooms and how much furniture is stored to select a common unit size.
Home Maintenance
Light Bulb Brightness
Plan approximate total room lumens. Use a broad lumen-per-square-foot planning range, adjusted by room and preference.
AC / Cooling Size
Get a preliminary room AC capacity range. Use the ENERGY STAR room-size guidance for 8 ft ceilings, then adjust broadly for ceiling height and sun.
Dehumidifier Size
Get a broad portable unit capacity range. Use a broad pints-per-day range based on area and perceived dampness.
Interior
Paint Calculator
Estimate wall paint for a rectangular room. Calculate a clear material estimate and save it to a project.
Flooring Calculator
Add rooms and estimate flooring with waste. Calculate a clear material estimate and save it to a project.
Tile Calculator
Count tiles for a floor or wall area. Calculate a clear material estimate and save it to a project.
Construction
Landscaping
Mulch Calculator
Estimate mulch by area and depth. Calculate a clear material estimate and save it to a project.
Soil Calculator
Plan soil for a rectangular bed. Calculate a clear material estimate and save it to a project.
Gravel Calculator
Estimate gravel volume for a project. Calculate a clear material estimate and save it to a project.
Exterior
Moving
Grades
Final Exam Grade Calculator
Find the score you need on your final to reach a course grade.
GPA Calculator
Calculate your GPA with course grades, credits and your own grade-point scale.
Target Grade Calculator
Find the average you need on the work still ahead.
Assignment Impact Calculator
See how one assignment could change your overall grade.
Semester Grade Calculator
Combine grading periods and exams with custom weights.
Weighted Grade Calculator
Combine category averages based on the weight of each category.
Grade Percentage Calculator
See how your points and weights affect your grade.
Car Ownership Toolkit
Fuel, payments, maintenance and the real cost of driving.
Fuel & Driving
Fuel Cost Calculator
Find the cost of a drive before you go.
Commute Cost
See what getting to work or school adds up to.
Cheaper Gas Detour
Is driving farther for cheaper gas worth it?
Idling Cost
Estimate the fuel used while parked with the engine running.
MPG Improvement Savings
See how better fuel economy changes your budget.
Toll Cost
Total regular tolls along your route.
Carpool Savings
Compare solo commuting with shared driving costs.
Fuel Range
Estimate the distance left in your tank.
Premium Fuel Difference
See the extra cost of a higher fuel grade.
Gas Discount
Add up a per-gallon discount over time.
Road Trips
Conversions
EV & Hybrid
Buying & Financing
Car Payment
Turn a vehicle price into a monthly payment.
Payment to Car Price
Work backward from a payment you enter.
Early Loan Payoff
Find the effect of an extra monthly payment.
Cash vs Financing
Compare purchase costs and a separate return assumption.
Lease Mileage
Check your mileage pace against a lease allowance.
Ownership Costs
Selling / Depreciation
Maintenance
Repair vs Replace
Compare a repair with the cash outlay for a replacement.
Maintenance Cost Tracker
Keep dated service records for each vehicle.
Maintenance Interval
Check mileage until your next custom service.
Oil Change Comparison
Compare shop visits with your DIY costs.
Brake Cost
Total the parts and labor from your quote.
Battery Cost Per Year
Turn a replacement battery cost into an annual estimate.
Tires & Wheels
Personal Finance Toolkit
Savings, debt, budgets and everyday money math.
Saving
Interest
Compound Interest Calculator
See how contributions and compounding add up.
Simple Interest
Calculate interest without compounding.
APY vs APR
Convert between a nominal annual rate and effective yield.
Investment Growth
Separate contributions from hypothetical growth.
Investment Fee Impact
Compare growth before and after a yearly fee assumption.
Financial Basics
Rule of 72
A rough estimate of the time needed to double.
Net Worth
Subtract liabilities from the full value of your assets.
Debt-to-Income
Compare monthly debt payments with gross income.
Percentage Change
Compare an old amount with a new amount.
Inflation
Compare two CPI index values you supply from the same series.
Budgeting
Monthly Budget
Put monthly income and expenses in one place.
50/30/20 Budget
Try one common framework with your take-home pay.
Paycheck Budget
Set aside monthly bills from each paycheck.
Annual Expenses
Turn irregular bills into a monthly set-aside.
Subscription Cost
See recurring costs and possible cancellations.
Moving Cost Budget
Add the costs of your move.
Everyday Money
Daily Spending
See what a small regular purchase adds up to.
Discount
Apply consecutive discounts and a tax rate you enter.
Sales Tax
Calculate tax or work back from a total.
Tip
Split a bill and choose whether tax is included in the tip base.
Split Bill
Split by percentage shares or individual item totals.
Rent Increase
See the monthly, annual and longer-term difference.
Debt
Debt Payoff
Estimate payoff time with monthly interest and fixed payments.
Snowball vs Avalanche
Compare smallest-balance-first with highest-rate-first.
Extra Debt Payment
Compare your current payment with an extra amount.
Credit Card Payoff
Estimate card payoff or work backwards from a deadline.
Minimum Payment Cost
Estimate a declining percentage minimum or a fixed payment.
Credit Card Interest
Estimate interest from an average balance.
Loans
Income
Hourly to Salary
Convert wages to gross weekly, monthly and annual income.
Overtime Pay
Use your own overtime rate and eligible hours.
Raise
See the monthly and yearly effect of an income change.
Pay Cut
See the monthly and yearly effect of an income change.
Salary Difference
Compare yearly compensation after the costs you enter.
Take-Home Pay
Use your own estimated tax percentage and deductions.
Purchases
Purchase Savings
Estimate how long it takes to save for a purchase.
Purchase Impact
See cash remaining and the monthly effect of a purchase.
Future Cost with Inflation
Project a price using your own annual inflation assumption.
Purchase Break-Even
Compare upfront prices and monthly running costs.
Buy Once vs Subscription
Compare a one-time purchase with recurring payments.
Cost per Use
Divide purchase and maintenance costs by expected uses.
Retirement
Small Business Toolkit
Pricing, profit, fees and business planning.
Profit
Profit Margin Calculator
Profit margin is profit divided by revenue. Use target-price mode for reverse calculations.
Profit Per Unit Calculator
Enter your own numbers and compare the result.
Profit Target Calculator
Enter either a monthly or annual profit target.
Discount Impact Calculator
Assumes unit cost stays constant. A nonpositive discounted profit cannot recover positive profit through volume.
Pricing
Markup Calculator
Markup uses cost as the denominator. Margin uses selling price.
Margin vs Markup Calculator
Enter your own numbers and compare the result.
Service Pricing Calculator
The buffer is a target margin. Your hourly earnings are included in cost.
Price Increase Impact Calculator
Enter your own numbers and compare the result.
Products
Product Pricing Calculator
Percentage fees apply to the full sale price. All costs are per item.
Bundle Pricing Calculator
Enter your own numbers and compare the result.
Wholesale Pricing Calculator
Compare the calculated margin with your minimum target.
Marketplace Fee Calculator
Enter your current platform rates. These are example inputs, not platform fee schedules.
Shipping Profit Calculator
Enter your own numbers and compare the result.
Free Shipping Threshold Calculator
Assumes a constant gross margin before seller-paid shipping.
Inventory Reorder Point Calculator
Simplified formula: daily demand × lead time + safety stock.
Inventory Turnover Calculator
Use annual cost of goods sold and average inventory at cost.
Freelance
Freelance Rate Calculator
Tax reserve applies to profit after expenses. Admin hours add workload but do not create billable hours.
Project Quote Calculator
Enter your own numbers and compare the result.
Side Hustle Profit Calculator
Enter your own numbers and compare the result.
Freelance Project Profit Calculator
Enter your own numbers and compare the result.
Planning
Sales
Revenue Calculator
Choose the sales frequency. Multiple item rows are added together.
Sales Target Calculator
Enter your own numbers and compare the result.
How Many More Sales Calculator
Same volume comparison with constant unit costs.
Payment Fee Calculator
The gross-up result treats the transaction input as your desired net amount.
Invoice Total Calculator
Enter your own numbers and compare the result.
Commission Calculator
Enter your own numbers and compare the result.
Referral Fee Calculator
Enter your own numbers and compare the result.
Average Order Value Calculator
Enter your own numbers and compare the result.
Customer Acquisition Cost Calculator
Costs and acquired customers should cover the same period. Add channels to compare their costs.
ROAS Calculator
Revenue ROAS is attributed revenue divided by ad spend. It is not profit.
Marketing Break-Even ROAS Calculator
Assumes costs are percentages of attributed revenue. Fixed costs are excluded.
Cost Per Lead Calculator
Enter your own numbers and compare the result.
Lead to Customer Conversion Calculator
Enter your own numbers and compare the result.
Customer Lifetime Value Calculator
A simplified estimate with constant spending and retention. Acquisition costs and fixed costs are excluded.
LTV to CAC Ratio Calculator
Use a consistent revenue or profit basis when comparing ratios.
Deposit Calculator
Enter your own numbers and compare the result.
Cash Flow
Monthly Recurring Revenue Calculator
Annualized revenue is a run-rate estimate. It does not include future churn.
Churn Impact Calculator
Simplified projection with no new subscribers and constant churn.
Subscription Price Comparison Calculator
Enter your own numbers and compare the result.
Cash Flow Calculator
Use inflows and outflows for one matching monthly period.
Cash Runway Calculator
Enter your own numbers and compare the result.
Burn Rate Calculator
A negative burn means cash increased over the period.
Receivables Calculator
Use dated invoice rows to build the payment forecast.
Late Payment Cost Calculator
Simple daily interest using 365 days. Whether fees are enforceable depends on your agreement and applicable law.
Costs
Business Expense Tracker Calculator
Save these categories to My Business for manual tracking.
Fixed vs Variable Cost Calculator
Fixed costs stay broadly constant. Variable costs follow volume. Mixed costs contain both.
Cost Per Job Calculator
Enter your own numbers and compare the result.
Overhead Allocation Calculator
Enter your own numbers and compare the result.
Cost Per Hour of Operation Calculator
Enter your own numbers and compare the result.
Overhead Impact Calculator
Extra revenue depends on contribution margin after variable costs.
Employees
Employee Cost Calculator
Enter estimated employer costs. This is not payroll or accounting advice.
Hourly Employee Cost Calculator
Enter your own numbers and compare the result.
Contractor vs Employee Calculator
Worker classification depends on applicable laws and facts. Cost alone cannot decide classification.
Taxes
Creator Toolkit
Revenue, sponsorships, growth and content planning.
YouTube
YouTube Revenue Calculator
Estimated video revenue = views × RPM ÷ 1,000.
YouTube CPM to RPM
Estimated RPM = CPM × creator revenue-share fraction × monetized-playback fraction.
Shorts Revenue Estimator
Shorts revenue = Shorts views × assumed Shorts RPM ÷ 1,000.
Break-Even Views
Subtract non-ad revenue from production cost, floor the remaining amount at zero and multiply by 1,000 ÷ RPM.
Watch Time Calculator
Total watch hours = views × average view duration in minutes ÷ 60.
Average View Duration
Average view duration in minutes = total watch hours × 60 ÷ views.
Audience Retention
Average percentage viewed = average view duration ÷ video length × 100.
Watch Hours Goal
Subtract existing watch hours from the target, floor the gap at zero and multiply by 60 ÷ average view duration.
Thumbnail A/B Results
Calculate clicks divided by impressions times 100 for each thumbnail.
Title Test Tracker
Change the assumptions to match your own content. This is a planning estimate, not a prediction.
Video Performance Comparison
Change the assumptions to match your own content. This is a planning estimate, not a prediction.
Revenue
RPM Calculator
RPM = revenue ÷ total views × 1,000.
CPM Calculator
CPM = advertising spend ÷ impressions × 1,000.
Monthly Creator Revenue
Add monthly ads, sponsorships, affiliate income, memberships, donations, products, freelance work and other income.
Creator Income Split
For each income source, divide its amount by total income and multiply by 100.
Affiliate Commission
Commission per sale = product price × commission percentage ÷ 100.
Podcast Ad Revenue
Estimated podcast ad revenue = downloads per episode × CPM ÷ 1,000 × ad slots × episodes.
Newsletter Revenue
Estimate opens from subscribers and open rate, then clicks from opens and click rate.
Paid Membership Revenue
Gross membership revenue = members × price.
Sponsorships
Sponsorship Rate Calculator
The planning midpoint uses expected views × sponsor CPM ÷ 1,000 × the format multiplier, then applies the entered percentage additions.
Sponsorship CPM
Sponsor CPM = deal price ÷ expected sponsored views × 1,000.
Sponsorship Package
Add the prices of the eight package components, then apply the bundle discount to their combined total.
Sponsorship Discount
Discounted price = original price × (1 − discount percentage ÷ 100).
Brand Deal Profit
Subtract editing, thumbnail, travel, production and other costs from the sponsor payment.
Engagement
Affiliate Conversion
Conversion percentage = affiliate sales ÷ clicks × 100.
Engagement Rate Calculator
Add likes, comments, shares and saves, then divide by the chosen audience denominator and multiply by 100.
Like Rate
Like rate = likes ÷ views × 100.
Comment Rate
Comment rate = comments ÷ views × 100.
Share Rate
Share rate = shares ÷ views × 100.
Follower Conversion
Follower conversion = new followers ÷ views × 100.
Click-Through Rate
CTR = clicks ÷ impressions × 100.
Share Performance
Shares per thousand views = shares ÷ views × 1,000.
Growth
Subscriber Growth Calculator
Fixed growth divides the remaining subscriber gap by new subscribers per period.
Growth Rate
Absolute increase is the new audience minus the starting audience.
Views Needed for Subscriber Goal
Required views = remaining subscriber gap ÷ view-to-subscriber conversion fraction, rounded up.
View Goal Calculator
Divide the long-form view target by planned long-form uploads and the Shorts target by planned Shorts uploads.
Podcast Download Goal
Downloads per episode = total download target ÷ number of planned episodes.
Membership Goal
Members needed before fees = monthly revenue goal ÷ monthly membership price, rounded up.
Content Planning
Upload Goal Planner
Monthly production hours include video count times production and editing hours plus fixed monthly work.
Content Output Calculator
Count original pieces plus repurposed pieces per original, then add the other content categories entered for the selected period..
Content Repurposing
Potential output = original content count × (1 + the sum of derivatives per original).
Content Calendar
Change the assumptions to match your own content. This is a planning estimate, not a prediction.
Content Idea Bank
Change the assumptions to match your own content. This is a planning estimate, not a prediction.
Batch Recording Planner
Session length adds recording time for every video, one setup period and a transition period between consecutive videos..
Content Deadline Planner
Work backward from the publication date through review, thumbnail, editing and recording hours.
Upload Frequency
Uploads per week = uploads ÷ days observed × 7.
Business
Video Production Cost
Add the eight production-cost categories for total video cost.
Cost per Video
Average cost per video = total production spending ÷ videos completed.
Profit per Video
Add ad revenue, sponsor revenue and other video income, then subtract production cost.
Merch Profit
Profit per item = selling price minus product, shipping, percentage fees and other entered costs.
Digital Product Profit
Profit per sale = price after percentage fees minus fixed transaction and other costs.
Creator Break-Even
Monthly profit or loss = creator revenue minus monthly creator expenses.
Creator Expense Tracker
Change the assumptions to match your own content. This is a planning estimate, not a prediction.
Subscription Tracker
Change the assumptions to match your own content. This is a planning estimate, not a prediction.
Equipment Cost per Video
Subtract expected resale value from equipment cost, with a minimum of zero.
Equipment Break-Even
Projects needed to recover equipment cost = equipment cost ÷ additional profit per project, rounded up.
Freelance
Video Editing Rate
Editing quote = estimated hours × hourly rate × (1 + buffer percentage) + the entered extra charges.
Thumbnail Pricing
Thumbnail price combines design and revision hours at the hourly rate, then adds other costs.
Freelance Creator Rate
Minimum hourly billing rate = target income grossed up for the tax reserve plus expenses, divided by billable hours.
Project Quote
Add production and revision hours, multiply by hourly rate and add direct expenses.
Hourly vs Flat Rate
Flat-fee effective hourly pay = flat fee ÷ expected hours.
Revision Cost
Additional revision fee = extra revisions beyond the included scope × cost per extra revision.
Streaming
Streaming Revenue
Multiply subscriber count by average revenue per subscriber, then add the other monthly streaming income sources entered..
Stream Hours
Monthly stream hours = streams per week × hours per stream × 52 ÷ 12.
Stream Revenue per Hour
Streaming revenue per hour = total stream revenue ÷ hours streamed in the same period.
Donation Goal
Donations needed = fundraising target ÷ expected average donation, rounded up to a whole donation.
Time & Productivity
Outsourcing Break-Even
Value of freed time = saved hours × hourly time value.
Time Value
Revenue per working hour = revenue ÷ all working hours in the selected period.
Video Length to Editing Time
Estimated editing hours = finished video minutes × editing hours per finished minute.
Recording Time
Raw recording time = finished video length × the recording-to-finished-length ratio.