Free tools
Free Online Calculators
Free, fast calculators for AI costs, loans, investments and everyday maths. Everything runs in your browser, so nothing you type is sent to our servers.
AI & content
AI API Cost Calculator
Estimate the cost per request, per day and per month of an AI model from token counts and per-million-token prices.
Word, Character & Token Counter
Paste text to count words, characters, sentences and get a rough AI token estimate. Runs in your browser; nothing is uploaded.
AI Tool ROI Calculator
Work out whether an AI subscription pays for itself from hours saved, hourly value and team size.
Money & finance
EMI Calculator
Calculate the monthly EMI, total interest and total payment for a home, car or personal loan.
SIP Calculator
Estimate the future value of a monthly SIP investment for an assumed annual return.
Compound Interest Calculator
See how a lump sum grows with compound interest over time, with your choice of compounding frequency.
GST Calculator
Add or remove GST from an amount and see the CGST/SGST split. Choose any rate.
Everyday tools
Percentage Calculator
Find a percentage of a number, what percent one number is of another, and percentage change.
Discount Calculator
Work out the sale price and amount saved after a percentage discount, with an optional second discount.
BMI Calculator
Calculate body mass index from height and weight in metric or imperial units.
Age Calculator
Find an exact age in years, months and days, plus days until the next birthday.
Date Difference Calculator
Count the days, weeks and months between two dates.