Free Online Calculators
33 calculators for finance, health, education, and everyday math. No sign-up, no data stored — everything runs in your browser.
Popular
Loan Calculator
Calculate monthly payments, total interest, and amortization schedule for any loan. Free loan payment calculator with amortization.
Mortgage Calculator
Estimate monthly mortgage payments including taxes, insurance, and PMI. Home loan calculator with full payment breakdown.
EMI Calculator
Calculate equated monthly installments for loans. EMI formula and monthly payment calculator.
Compound Interest
See how your money grows with compound interest over time. Free compound interest calculator with formula.
Simple Interest
Calculate simple interest on a principal amount. Simple interest formula and calculator.
Retirement Calculator
Plan your retirement savings. Projected balance, safe withdrawal, and savings goals.
SIP Calculator
Calculate returns on Systematic Investment Plan with step-up SIP support.
FD Calculator
Calculate Fixed Deposit maturity amount with compound interest and different frequencies.
ROI Calculator
Calculate return on investment as a percentage. ROI formula and investment return calculator.
Break-Even Calculator
Find out how many units you need to sell to break even. Break-even analysis calculator.
Margin Calculator
Calculate profit margin from cost and selling price. Gross margin and margin percentage.
Markup Calculator
Calculate markup percentage, selling price, profit margin, and revenue from cost and markup. Free online markup calculator with formula and examples.
Inflation Calculator
Calculate how inflation affects purchasing power over time. Future value and CPI calculator.
Tip Calculator
Calculate tip amount and split the bill between people. Restaurant tip and bill splitter.
Discount Calculator
Find the sale price after applying a discount. Percent off and sale price calculator.
Salary Calculator
Convert between hourly, monthly, and annual salary. Wage and income converter.
Percentage Calculator
Calculate percentages: what is X% of Y, X is what % of Y, and percentage change.
Income Tax Calculator
Estimate your income tax with bracket breakdown. US federal and India new regime.
Fuel Cost Calculator
Calculate trip fuel costs, gas needed, and CO₂ emissions. MPG and L/100km.
Unit Converter
Convert between units of weight, length, temperature, volume, area, speed, and data.
BMI Calculator
Calculate your Body Mass Index and healthy weight range. Free BMI calculator with formula.
Calorie Calculator
Find your daily calorie needs, BMR, TDEE, and macros. Calorie and macro calculator.
Body Fat Calculator
Estimate body fat percentage using the U.S. Navy method. Body composition calculator.
Water Intake Calculator
Calculate your recommended daily water intake. Hydration calculator.
Pregnancy Due Date Calculator
Calculate your estimated due date, current trimester, and pregnancy milestones.
Pace Calculator
Calculate running pace, speed, and race finish times for 5K, 10K, half marathon, marathon.
Ovulation Calculator
Predict ovulation date, fertile window, and next period based on your cycle.
Sleep Calculator
Calculate optimal bedtime or wake-up time based on 90-minute sleep cycles.
Age Calculator
Calculate your exact age in years, months, and days. Find days until your next birthday.
Date Calculator
Calculate the number of days, weeks, months, and years between two dates. Days between dates.
Time Calculator
Calculate hours and minutes between two times. Decimal hours for timesheets.
About OmniCalculator
OmniCalculator is a free collection of 33 online calculators covering finance, health, education, and everyday math. Every calculation runs entirely in your browser — we never store your data or require an account.
Our financial calculators help you plan loans, mortgages, EMIs, compound interest, SIPs, and retirement savings. Health calculators cover BMI (with age and gender-specific classifications for children), calories, body fat, and water intake. Education tools include GPA calculators for 4.0, 5.0, and 10.0 scales, plus CGPA to percentage converters for Indian universities.