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Calculators that explain the answer

Mortgage, EMI, compound interest (APY & schedules), SIP, BMI, live FX, and 506+ more calculators — each with steps, a worked example, and the formula.

Mortgage EMI SIP Compound Daily Compound Currency BMI 3D DIY

Every tool shows steps, a worked example, and the formula — so you can trust the number.

506+

Calculators

Free forever

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Live FX

Multi-currency

25 guides

In-depth articles

506+ calculators · Free forever · No signup · Live FX · Charts & schedules · Educational estimates — not financial advice.

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What do you want to figure out?

Jump by goal — mortgage, EMI, SIP, BMI, FX, and more.

Plan a home payment

Mortgage P&I, tenure, interest, and yearly amortization schedule.

Estimate a loan EMI

Personal, auto, or home-style EMI with interest chart and schedule.

Grow with compound interest

Future value, APY, deposits, rate of return, and yearly schedule.

Project monthly investing

SIP / recurring investment growth illustrations.

See daily compounding

Day-by-day interest with deposits, reinvest %, and snapshots.

Convert currencies

Live educational FX for travel and freelancing.

Check BMI & calories

BMI, BMR, TDEE — educational fitness numbers.

Do scientific math

Trig, logs, powers — plus 3D viz nearby.

Split a bill & tip

Tip percent and even splits without mental math.

Find break-even units

Fixed costs, price, and contribution margin.

Money

Mortgage, EMI, SIP & compound

Jump the money quartet — plus day-by-day compounding. USD defaults; pick any currency for display.

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Mortgage EMI SIP Compound Daily Compound Percentage Tip

Live FX & money

USD, EUR, GBP, INR, AED and more — results format in your currency.

Chart

Charts & schedules

Amortization tables, compound yearly schedules with APY, SIP curves, and snapshots.

Guide

506+ calculators with supporting guides

Every calculator page has how-to steps, a worked example, formula notes, and FAQs; longer guides explain the maths behind them.

Library

Browse by category

Dense directories with counts — find tools in one tap.

109

Finance

Mortgage & EMI payments, daily/compound interest, SIP growth, taxes, savings, retirement, APR vs APY, and multi-currency money tools — each with guides, worked examples, and FAQs.

Math

Basic and scientific math, percentages, averages, algebra solvers, geometry (circle, Pythagoras), graphing, and showcase 3D tools — with formula notes you can check against homework.

Health & Fitness

BMI, BMR, TDEE, macros, body fat, water intake, one-rep max, and pregnancy due-date tools using published educational formulas — not medical advice.

Conversion

Length, weight, temperature, area, volume, speed, cooking, data, and time converters with clear SI / customary factors for school, travel, and DIY.

Date & Time

Date differences, age from date of birth, add/subtract days, and business-day helpers — leap years respected, holiday calendars usually manual.

106

Everyday Life

Tips, bill split, fuel cost, recipe scaling, DIY quantities, GPA helpers, and household planning calculators with practical defaults.

Science & Engineering

Ohm’s law, kinetics, speed/distance/time, energy, and other textbook physics/engineering helpers with SI-friendly inputs for class and lab checks.

Business

Margin vs markup, break-even, hourly-to-salary, ROI, and pricing helpers so founders can pressure-test ideas before a full spreadsheet model.

Education

Final grade needed, grade percentage, GPA-style helpers, and study-friendly math — match your syllabus weights before trusting a target score.

Statistics

Mean, median, mode, standard deviation, combinations/permutations, and classical probability helpers for homework and quick exploratory checks.

Commodities & Metals

Live gold, silver, platinum, copper, and crude reference quotes plus weight, purity, and jewelry melt-value estimators — delayed educational feeds, not trade tickets.

Quick open

Scientific calculator

Trig, logs, powers — full keypad

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About the library

Calculators, with the reasoning shown

MyCalcsWorld is an independent library of free calculators for money, health, maths, units and everyday projects. Each tool is meant to show its working: the inputs you can change, the formula behind the result, and a worked example you can reproduce by hand.

The maths runs in your browser. Worked examples are either generated from a calculator's own default inputs or worked by hand and double-checked against the formula shown, and our automated tests compare outputs with hand-worked examples. Results are educational estimates, not financial, tax, medical, or legal advice. Read how we check and correct tools on the About page.

When a topic needs more than a form, we write a guide. Start with one of these:

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3D DIY

Construction & outdoor in 3D

Driveway asphalt, slabs, decks, fences, gravel, and more — orbit each model while you size materials.

All 3D tools →

Driveway Asphalt Concrete Slab Deck Boards & Joists Fence Panels & Posts Gravel Fill Retaining Wall Soil Excavation Spiral Staircase +10 more on /3d

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