Calculators
Everyday math that answers as you type: percentages and discounts, age, BMI and unit conversion, plus seller tools for margin and break-even, loan payments, savings interest, GPA and splitting a bill. Fill in the numbers and the result is right there, with the formula shown where it helps.
Percentage Calculator
A percentage calculator that shows the formula behind every answer
Age Calculator
An age calculator with exact years, months, days and a birthday countdown
BMI Calculator
A BMI calculator with WHO categories and a healthy weight range
Unit Converter
A two-way unit converter for seven categories, with exact definitions
Split Bill Calculator
A multi-round bill splitter with exact rounding and settle-up transfers
Margin Calculator
Solve cost, price, margin and markup from any two, with fees, shipping and tax
Break-Even Calculator
Find break-even units, revenue and the units needed for a profit goal
Loan Calculator
Monthly payment, total interest and a full amortization schedule with CSV download
Savings Calculator
Deposit and monthly savings interest, simple or compound, with optional tax
GPA Calculator
Cumulative and major GPA on 4.0, 4.3 and 4.5 scales with conversion
Rental Yield Calculator
Annual rental yield on invested cash, with loan interest and a gross-yield comparison
Stock Return Calculator
Net profit, return and average cost from your trades, plus an averaging-down mode
Stacked Discount Calculator
Final price and effective discount when percent and fixed discounts stack
Bundle Discount Calculator
Bundle price, price per item and the real cost of buy N get M free deals
Unit Price Comparison
Convert prices and sizes to unit prices and find the cheapest product
ROAS and ROI Calculator
ROAS, ROI, break-even ROAS and profit after ads from spend, revenue and margin
Ad Metrics Calculator
CPC, CPM, CTR, CVR and CPA from spend, impressions, clicks and conversions
AOV and Conversion Rate
Average order value and conversion rate, with goal-based orders and visits
Inventory Turnover Calculator
Inventory turnover and days of inventory from cost of goods sold and average stock
YouTube Revenue Estimator
Estimate a monthly YouTube revenue range from views, RPM and Shorts share