Calculate anything,
instantly.
Free online calculators for finance, health, math, education, and more. Fast, accurate, and designed for everyone.
All Tools
All Calculators
Loan Calculator
Monthly payment, interest & amortization for any loan.
Mortgage Calculator
Monthly mortgage payment with taxes & insurance.
Interest Calculator
Simple & compound interest with growth schedule.
Savings Calculator
Future value of savings with monthly contributions.
Investment Calculator
Portfolio growth with recurring contributions.
Retirement Calculator
Retirement corpus & monthly income projection.
India Tax Calculator
Old vs New Regime with 80C/80D deductions.
US Tax Calculator
Federal + all 50 state taxes with FICA.
UK Tax Calculator
Income Tax, NI & Student Loan.
Germany Tax Calculator
Brutto-Netto with Steuerklasse & social.
France Tax Calculator
Impôt sur le revenu with quotient familial.
Australia Tax Calculator
ATO rates + HECS + Medicare.
Canada Tax Calculator
Federal + provincial tax, CPP & EI for 2026.
Paycheck Calculator
Take-home pay after taxes & deductions.
Car Loan Calculator
Auto loan payment with trade-in & sales tax.
Currency Converter
Live exchange rates for 30+ currencies.
Gold Calculator
Live gold price by karat & weight in USD.
BMI Calculator
Body Mass Index with WHO classification.
Calorie Calculator
Daily calorie needs using Mifflin-St Jeor.
TDEE Calculator
Total daily energy with cutting/bulking macros.
BMR Calculator
Basal metabolic rate — Mifflin & Harris-Benedict.
Scientific Calculator
Trig, log, powers, roots & factorial functions.
Percentage Calculator
Percent of, increase, decrease & difference.
Unit Converter
Length, weight, temperature, volume & more.
Age Calculator
Exact age + next birthday countdown.
Date Calculator
Days between dates with business days.
Time Calculator
Time difference, add & subtract time.
GPA Calculator
Semester & cumulative GPA on 4.0 scale.
Dragon Battle Simulator
House of the Dragon S3 — simulate dragon battles with lore stats.
AI Data Center Cost Calculator
GPU cluster CAPEX, OPEX, power & cloud break-even.
Browse by
Categories
Finance
Loan, mortgage, savings, investment, tax, and paycheck calculators for smart financial planning.
Health
BMI, calorie, TDEE, and BMR calculators for fitness and nutrition tracking.
Math
Scientific calculator and percentage tools for everyday math, academics, and professional use.
Date & Time
Age, date difference, and time calculators for everyday planning and scheduling.
Education
GPA calculator for college and university students on the standard 4.0 scale.
Technology
Unit converter for length, weight, temperature, volume, speed, area, and digital storage.
Entertainment
Fun simulators and interactive tools based on popular shows and culture.
Smart financial
decisions start here.
Loan, mortgage, savings, investment, retirement, tax, paycheck, and car loan calculators. Everything you need to manage your money wisely.
All 17 Finance CalculatorsLoan Calculator
Monthly payment, interest & amortization for any loan.
Mortgage Calculator
Monthly mortgage payment with taxes & insurance.
Interest Calculator
Simple & compound interest with growth schedule.
Savings Calculator
Future value of savings with monthly contributions.
Investment Calculator
Portfolio growth with recurring contributions.
Retirement Calculator
Retirement corpus & monthly income projection.
BMI Calculator
Body Mass Index with WHO classification.
Calorie Calculator
Daily calorie needs using Mifflin-St Jeor.
TDEE Calculator
Total daily energy with cutting/bulking macros.
BMR Calculator
Basal metabolic rate — Mifflin & Harris-Benedict.
Your health,
quantified.
BMI, calorie, TDEE, and BMR calculators backed by validated medical formulas.
All 4 Health CalculatorsWhy MyCalcToolkit
Built different.
Not just another calculator site. We obsess over speed, accuracy, and design.
Instant Results
No page reloads. Results update in real-time as you type. Every calculator runs entirely in your browser.
Mobile First
Designed for touch. Works perfectly on phones and tablets with range sliders and large tap targets.
Accurate & Private
Industry-standard formulas. No data leaves your device. No sign-up, no tracking. Just math.
30
Calculators
6
Categories
0ms
Server Latency
100%
Free Forever
Why Trust Us
Built on accuracy.
Every calculator is formula-verified, source-referenced, and designed to give you reliable results you can act on.
Ayush Chauhan
Creator & Developer
MyCalcToolkit is built by Ayush Chauhan, a software engineer who believes everyone deserves access to fast, accurate calculation tools without paywalls or confusing interfaces. Every calculator is hand-crafted with attention to mathematical correctness and user experience.
Learn more about usOur Mission
Provide free, reliable, and instant online calculators that help people make informed financial, health, and educational decisions. We aim for:
- ✓ Accuracy backed by authoritative sources
- ✓ Transparency — formulas and methodology disclosed
- ✓ Privacy — no data leaves your device
- ✓ Accessibility — works on any device, no sign-up
Formula Validation
Every formula is sourced from authoritative references — IRS for tax rates, WHO/CDC/NIH for health metrics, CFPB and Federal Reserve for financial formulas. Results are cross-verified against official tools.
Editorial Process
Each calculator page includes methodology disclosure, source references, and category-specific disclaimers. Content is written in plain language, factually accurate, and regularly reviewed for currency.
Content Updates
MyCalcToolkit periodically reviews and updates content to reflect the latest tax rates, financial regulations, and health guidelines. User-reported errors are investigated and corrected promptly.
Our Sources Include
FAQ
Frequently Asked Questions
What is MyCalcToolkit?
MyCalcToolkit is a free calculator platform with 30 production-grade tools covering finance, health, math, date & time, education, and technology. All calculations run in your browser — no server, no sign-up, no tracking.
Are the calculators accurate?
Yes. We use industry-standard formulas (Mifflin-St Jeor for BMR, standard amortization for loans, 2024 tax brackets) and validate against authoritative sources.
Does it auto-detect my currency?
Yes. All finance calculators automatically detect your country from your browser timezone and display the correct currency symbol (₹, $, £, €) and number format (lakh vs million).
Does it work on mobile?
Absolutely. Every calculator is mobile-first with touch-friendly sliders, responsive layouts, and 16px font sizes that prevent iOS zoom.
Is my data private?
Yes. All calculations happen in your browser. We never send your inputs to any server. No cookies, no tracking. Your financial and health data stays on your device.
Ready to calculate?
30 production-grade calculators. Free forever. No sign-up needed.