Calculators & Tools
Money, health, everyday maths and AI cost tools. Everything runs in your browser. Nothing you type is stored or sent anywhere.
AI API Cost Calculator
Estimate what an AI model API will cost for your usage.
Enter the prices from your provider's pricing page; they change often. Any currency works, and results use the same one.
AI Token & Word Counter
Count words, characters and estimate tokens for a prompt.
Token counts are an estimate (about 4 characters per token in English). Real tokenizers vary by model.
EMI Calculator
Monthly loan instalment, total interest and total payment.
SIP Calculator
Project the future value of monthly SIP investments.
Projection only. Market returns are not guaranteed.
Percentage Calculator
Percent of a number, percent change and what-percent-is.
GST Calculator
Add or remove GST from any price.
Use the rate that applies to your item or service. Rates are revised by the GST Council.
BMI Calculator
Body mass index with the standard WHO category.
General information only, not medical advice. BMI does not account for muscle mass, age or body composition.
Age Calculator
Exact age in years, months and days, plus days to next birthday.