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Everyday math: age, loans, dates, BMI.
Age Calculator
Exact age in years, months, days — as of today or any date
EMI / Loan CalculatorPopular
Monthly payment on a loan, with an optional prepayment and a real payment-date schedule
Percentage Calculator
Three common percentage questions
Date Difference Calculator
Exact years, months and days between two dates, plus business days
BMI CalculatorPopular
Body mass index from height and weight, with healthy ranges, BMI Prime, Ponderal Index and an estimated body fat %
Compound Interest Calculator
Growth of savings or investment, with optional regular contributions
Discount Calculator
Sale price after one or two stacked discounts, plus tax
Tip Calculator
Split a bill, tax and tip between people
Break-even Point Calculator
Units and revenue needed to cover fixed costs, with a cost-vs-revenue chart and margin of safety
209 tools across 33 categories · 20 call a live API — everything else runs entirely in your browser.