Free Online Calculators & Converters

15 fast, accurate, ad-free calculators for health, finance, maths, and unit conversion — all running privately in your browser.

BMI Calculator

Body Mass Index

Calorie Calculator

Daily calorie needs

Body Fat Percentage Calculator

Estimate body fat percentage

Tip Calculator

Split bills easily

Mortgage Calculator

Home loan payments

Loan Calculator

Monthly loan payments

Compound Interest Calculator

Investment growth

Savings Goal Calculator

Reach your savings goal

Discount Calculator

Sale price & savings

Age Calculator

Exact age in years

GPA Calculator

Grade Point Average

Length Converter

cm, m, miles & more

Weight Converter

kg, lb, oz & more

Temperature Converter

°C, °F, K

Fuel Efficiency Converter

MPG ↔ L/100km

What is QuickCalc?

QuickCalc is a small collection of free online calculators and converters that run entirely in your browser. There is no signup, no tracking, and no data ever leaves your device — every calculation happens locally. If you need a quick BMI check, a mortgage payment estimate, a tip split, or a unit conversion, the right tool is one click away.

Popular calculators

Some of our most-used tools: the BMI Calculator for a quick weight-and-height health check, the Mortgage Calculator for estimating monthly home-loan payments, the Tip Calculator for splitting restaurant bills, the Compound Interest Calculator for projecting investment growth, and the Calorie Calculator for daily calorie needs.

Why use QuickCalc

The internet has plenty of calculator sites, but most are slow, cluttered with ads, or want your email before they'll show a result. QuickCalc loads in under a second, works on any device, and has nothing to sell you. Every page is a focused tool with a clear answer.

Regional versions

Localized variants of our most-searched calculators with regional rates, customs, and currencies.

🇬🇧 UK Mortgage Calculator Pounds, 25-year term, UK rates 🇦🇺 Australian Mortgage Calculator AUD, LVR & LMI explained 🇨🇦 Canadian Mortgage Calculator CAD, 5-year fixed, stress test 🇬🇧 UK Tip Calculator Service charge & UK tipping norms 🇦🇺 Australian Tip Calculator AUD, when to tip in Australia 🇬🇧 UK Degree Classification First, 2:1, 2:2, 3rd

Why Choose QuickCalc?

Built for speed, privacy, and ease of use.

⚡

Lightning Fast

Get instant results. No waiting, no loading.

🔒

100% Private

All calculations happen in your browser. We never store or share your data.

📱

Mobile Friendly

Works perfectly on phones, tablets, and computers.

🌟

Always Free

No subscriptions, no hidden fees. Completely free forever.