All Your Calculators & Tools
In One Place
Finance, health, time, and utility tools - fast, accurate, and completely free.
💡 Honestly, it started because my girlfriend wanted to play word games without downloading an app. I built a few games, then kept adding calculators I found myself Googling: EMI, GST, BMI, salary breakdowns. One thing led to another and here we are. ToolHaven is still that same idea: useful stuff, free, no signup, just open and use.
What is ToolHaven
It's a collection of 143+ free calculators, tools, and games that covers the kind of stuff people actually Google. EMI on a loan, how much GST to add on an invoice, what your salary looks like after deductions, how many calories to eat to lose weight. Everything runs in your browser, nothing requires an account, and nothing you enter gets sent anywhere.
Finance tools
The finance section covers a lot of ground. EMI for home loans, car loans, personal loans. SIP and PPF calculators for long-term planning. Salary in-hand after PF and tax. GST on invoices. HRA exemption. Old vs new tax regime comparison. There's also a Home Loan Prepayment Calculator that shows you exactly how much interest you save by paying extra upfront.
Health tools
BMI with your healthy weight range. TDEE so you know how many calories you actually burn in a day. Body fat using the US Navy method. Macros for protein, carbs, and fat based on your goals. Also ideal weight, BMR, water intake, running pace calculator, and waist-to-hip ratio.
Everything else
Unit conversions, fuel cost for a trip, electricity bill estimator, recipe scaler. For developers: JSON formatter, regex tester, UUID generator, Base64 encoder, px-to-rem converter. Time tools for date differences, business day counts, timezone conversion, and countdowns. Text tools for word count, password generation, QR codes, and case conversion.
Free, no account, no tracking
Every tool is free and will stay free. No premium tier, no login wall. Since the calculations happen in your browser, your numbers never leave your device. What you calculate is your business.