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Trusted by millions of users worldwide
Grade Calculator
Calculate your final grade based on weighted assignments. Find what score you need on rema…
GPA Calculator
Calculate GPA for semester or cumulative grade point average. Supports 4.0 and weighted GP…
Calorie Calculator
Calculate how many calories you need per day to lose weight, maintain, or gain muscle. Bas…
Dice Roller
Roll virtual dice online. Supports d4, d6, d8, d10, d12, d20, d100, and custom dice. Roll …
Age Calculator
Calculate exact age from date of birth. Find age in years, months, weeks, and days. See ne…
CPS Test
Free CPS test — measure your clicks per second in 5, 10, 15, or 30 seconds. Kohi-style cli…
Binary Translator
Translate binary to text, convert binary to decimal, decimal to binary, and perform binary…
Online Mirror
Free online mirror — use your phone or laptop camera as a mirror instantly. No download ne…
Mortgage Calculator
Calculate your monthly mortgage payment, total interest, and amortization schedule. Free m…
BMI Calculator
Calculate your Body Mass Index (BMI) instantly. Supports both metric (kg/cm) and imperial …
Compound Interest Calculator
Calculate compound interest on investments and savings. See how your money grows over time…
Percentage Calculator
Calculate percentages three ways: find X% of Y, what percent X is of Y, and percentage cha…
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Desktop, tablet, mobile — every calculator is fully responsive.
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Tailored for USA, UK, Canada, Australia, and Europe.
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CalcProTool offers 295+ free online calculators covering finance, health, math, electrical engineering, unit conversions, and emerging tools for AI cost estimation and sustainability planning. Every calculator is completely free to use, with no registration, no subscription, and no data collection.
Our financial calculators help you make informed decisions about mortgages, loans, investments, and retirement. The mortgage calculator lets you compare loan scenarios and understand amortization schedules. The compound interest calculator shows the power of long-term investing.
For health and fitness, our BMI calculator, calorie calculator, and macro calculator give you the data you need to reach your goals. Students love our GPA calculator, grade calculator, and math suite. The dice roller supports all standard RPG dice for D&D and tabletop games.