Free Online Calculators
18 calculators for finance, tax, health and everyday maths. No sign-up — instant results on any device.
18 free calculatorsZero sign-ups⚡ instant results
💰 Finance & Money
Calculate bills, tax, loans and savings.
💪 Health & Body
BMI, calories, sleep and fitness calculations.
All Free Calculators
18 calculators covering money, tax, health, physics and more. No sign-up. Instant results.
Percentage Calculator
Work out percentages instantly — discounts, tips, scores
Tip Calculator
Calculate tip and split any bill instantly
Split Bill
Divide costs evenly across any group
Loan Calculator
Monthly repayments and total cost for any loan
Discount Calculator
Find the sale price after any percentage off
UK Tax Calculator
Income tax and National Insurance estimate
US Tax Calculator
Federal income tax for any filing status
VAT Calculator
Add or remove VAT at any rate
Pension Calculator
Project your retirement pot at any age
Savings Goal
How long to reach your savings target
Inflation Calculator
What money was worth in any year
Grade Calculator
Work out your weighted grade or GPA
Speed / Distance / Time
Solve any physics formula in seconds
Currency Converter
Live exchange rates between 12 currencies
Age Calculator
Your exact age in years, months and days
Calorie / TDEE Calculator
Daily calorie needs based on your goal
BMI Calculator
Body Mass Index and healthy weight range
Calculator
Standard and scientific calculator
Free Online Calculators — Instant Results
TooLegend's free calculators cover everything from everyday maths to complex financial planning. Whether you need to split a restaurant bill, calculate your UK income tax, work out mortgage repayments or check your BMI — every calculator gives you an instant result with no sign-up required.
What can these calculators do?
- Financial calculators — loan repayments, VAT, tax (UK and US), pension projections, savings goals and inflation
- Everyday calculators — tip splitting, discount prices, percentage calculations and currency conversion
- Health calculators — BMI, daily calorie needs (TDEE), body fat percentage and sleep cycles
- Academic calculators — weighted grade averages, GPA and speed/distance/time physics formulas
Every calculator is mobile-optimised, loads instantly and works offline once the page has loaded.
Frequently Asked Questions
Are these calculators free to use?
Yes — completely free. No account, no subscription and no hidden costs. All calculators work instantly in your browser.
How accurate are the tax calculators?
The UK and US tax calculators use current tax bands and rates. They give accurate estimates for most situations but are not a substitute for professional tax advice on complex cases.
Do these calculators work on mobile?
Yes — every calculator is built mobile-first and works perfectly on any smartphone or tablet.
Can I use these offline?
Once a page has loaded, most calculators will continue to work even if your internet connection drops, as all the maths runs in your browser.
Why is the currency converter rate different to my bank?
The currency converter uses open exchange rate data. Banks and transfer services add their own margins, so rates will differ slightly.
Yes — all financial calculations use standard industry formulas. The UK Tax Calculator uses current HMRC rates for 2025/26. The BMI Calculator uses the WHO standard formula. The Loan Calculator uses the standard amortisation formula used by banks. All results include a disclaimer to consult professionals for significant financial or medical decisions.
Yes — all calculators are fully responsive and work on mobile, tablet and desktop. They are optimised for touch input with minimum touch targets of 44px. No app to download.
No — all calculations happen in your browser. Nothing is sent to any server. Your inputs are never saved or stored. The only exception is the "recently used tools" feature on the homepage, which stores tool names (not your inputs) in your browser's local storage.