A free, fast, and trustworthy calculator suite built for students, professionals, and curious minds worldwide.
Calcivus is a free online calculator platform providing over 100 tools across math, finance, health, unit conversions, engineering, statistics, date & time, and developer utilities. Every tool is built to be fast, accurate, and usable on any device — from a phone to a desktop.
We believe calculation tools should be free and accessible to everyone — without ads interrupting your work, without forced signups, and without slow loading times.
To make every calculation instant and free. Whether you're a student solving quadratic equations, a homeowner calculating a mortgage, a fitness enthusiast tracking calories, or a developer converting hex to RGB — Calcivus has the tool ready for you in one click.
Math & Algebra — from basic arithmetic to scientific calculations, quadratic solvers, matrix calculators, and more.
Finance & Money — compound interest, loan EMI, mortgage payments, ROI, GST/VAT, salary breakdowns, and investment tools.
Health & Fitness — BMI, BMR, TDEE, calorie burn, body fat percentage, ideal weight, macros, and more.
Unit Conversions — length, weight, temperature, volume, speed, pressure, data storage, cooking measurements, and more.
Date & Time — age calculation, date differences, working days, time zone conversion, and countdowns.
Engineering & Physics — Ohm's law, force, torque, kinetic energy, projectile motion, and density.
Statistics — mean, median, mode, standard deviation, z-score, probability, combinations, and confidence intervals.
Developer Tools — binary/hex converters, color codes, Base64, hash generators, JSON formatter, and more.
Have a suggestion for a new calculator, found a bug, or want to collaborate? We'd love to hear from you. Visit our contact page or email us directly.