We believe everyone deserves clear, accurate calculators — no paywalls, no sign-ups, no nonsense.
QuickSum started with a simple observation: the best financial and health calculators were either buried inside products trying to sell you something, or locked behind subscription paywalls. We built QuickSum to fix that.
Every calculator on this site is free, runs entirely in your browser, and never sends your data anywhere. Whether you’re planning a mortgage, tracking your BMI, converting currencies, or splitting a dinner bill, you can trust that the number you see is based on the same standard formula a professional would use.
Finance, health, and everyday tools — all in one place, all free.
Every calculation runs locally in your browser. We never see the numbers you enter.
Real exchange rates from the European Central Bank, updated every 10 minutes.
Works beautifully in any colour scheme, on any screen size.
Every calculator, article, and tool on QuickSum is free to use, with no accounts, paywalls, or usage limits. We believe basic financial and health maths should be accessible to everyone, and nothing on this site — calculator results or editorial content — is ever influenced by commercial partners.
The site is deliberately lightweight: no heavy frameworks, no trackers beyond basic anonymous analytics, and every calculation runs privately in your own browser.
QuickSum uses standard, peer-reviewed formulas for every calculation. Our finance calculators use standard amortisation maths and 2024 US tax brackets. Our health calculators use the WHO BMI formula, the Mifflin-St Jeor calorie equation, and the U.S. Navy body fat method.
That said, results are estimates. Real-world outcomes depend on factors our calculators cannot know about — your individual tax situation, lender fees, health conditions, and more. Always verify important decisions with a qualified professional.
Found a bug? Have a calculator you would like to see added? Just want to say hello? We genuinely read every message.