Calculators for the numbers that matter
From calories and body fat to loans, mortgages, percentages and tips — free, private, and instant. Nothing is uploaded or stored.
💪 Fitness & Health
Calories, body metrics, training and more.
Browse all 20 Fitness & Health calculators →TDEE & Macro Calculator
Calories to maintain, lose or gain — plus macros.
Calorie Deficit Planner
Daily calories to hit your goal weight by a date.
Weight Tracker
Log your weight and watch your trend line.
Protein Intake
Your daily protein target for your goal.
Calories Burned
Calories burned by activity and time.
BMI Calculator
Body Mass Index + your healthy weight range.
Body Fat Calculator
Estimate body fat % with the US Navy method.
BMR Calculator
Calories your body burns fully at rest.
Ideal Weight Calculator
Your ideal weight range for your height.
Heart Rate Zones
Max heart rate + 5 training zones.
One-Rep Max (1RM)
Your 1RM and a full lifting percentage table.
Running Pace
Pace, finish time and race predictions.
Water Intake Calculator
How much water to drink per day.
Ovulation Calculator
Your fertile window and ovulation day.
Pregnancy Due Date
Due date, current week & trimester.
Sleep Calculator
Best bedtimes & wake times by sleep cycle.
Waist-to-Hip Ratio
WHR & waist-to-height health-risk check.
Lean Body Mass
Your LBM & fat mass (3 formulas).
Macro Calculator
Protein, carbs & fat for your goal.
Steps to Calories
Steps to calories burned & distance walked.
💰 Finance & Money
Loans, mortgage, savings and investing.
Browse all 19 Finance & Money calculators →Loan / EMI Calculator
Monthly payment, total interest & payoff.
Mortgage Calculator
Home loan payment with tax & insurance.
Compound Interest
Watch your savings grow over time.
Car Loan Calculator
Auto loan payment with down & trade-in.
Savings Goal Calculator
Monthly saving needed to hit a target.
Retirement Calculator
Project your retirement nest egg.
Zakat Calculator
Your Zakat with automatic nisab check.
Salary ↔ Hourly
Convert pay between hourly and annual.
Credit Card Payoff
Months & interest to clear your balance.
Inflation Calculator
Future value & lost purchasing power.
Income Tax (Pakistan)
Salary tax & take-home, FY 2026-27 slabs.
Debt Snowball vs Avalanche
Which payoff plan clears debt fastest.
Net Worth Calculator
Assets minus liabilities, with breakdown.
50/30/20 Budget
Split income into needs, wants & savings.
Rent vs Buy
Which is cheaper, with a break-even point.
ROI Calculator
Return on investment + annualized (CAGR).
Break-Even Calculator
Units & revenue to cover your costs.
Home Affordability
How much house you can afford (28/36).
Gratuity / End-of-Service
Estimate your end-of-service benefit.
🧮 Everyday & Math
Percentages, dates, tips and quick daily math.
Browse all 26 Everyday & Math calculators →Percentage Calculator
Percent of, change and share — 3 modes.
Age Calculator
Exact age and days to your next birthday.
Date Difference
Days, weeks and months between two dates.
Tip Calculator
Tip amount and split between people.
Discount Calculator
Sale price and how much you save.
Fuel Cost Calculator
Cost of fuel for any trip.
GPA Calculator
Semester & cumulative GPA on the 4.0 scale.
Sales Tax / VAT
Add or remove tax from any price.
Electricity Bill
Monthly cost by appliance & usage.
Work Hours / Timesheet
Weekly hours from clock-in/out, plus pay.
Grade Calculator
Score to grade & what you need on the final.
Cooking Converter
Cups to grams, tbsp, ml by ingredient.
Days Until (Countdown)
Count down to any date or event.
Paint Calculator
How much paint a room needs.
Concrete Calculator
Concrete volume & bags for a slab.
Tile & Flooring
Tiles, boxes & waste for any area.
Dog Age Calculator
Dog years to human years — real vet formula.
Time Duration Calculator
Hours & minutes between two times.
Temperature Converter
Celsius, Fahrenheit & Kelvin in one place.
Height Converter
cm to feet & inches, and back.
Weight Converter
kg to lbs, stone & ounces.
Roman Numeral Converter
Numbers to Roman numerals, and back.
Fraction Calculator
Add, subtract, multiply & divide fractions.
Length Converter
Miles, km, meters, feet & yards.
Speed Converter
mph, km/h, m/s & knots.
Data Storage Converter
Bytes, KB, MB, GB & TB (1024 or 1000).
Why Calcelo?
Private
Every calculation runs in your browser. Your numbers are never sent anywhere.
Instant
Results update live as you type — no waiting, no page reloads.
Trusted formulas
Standard, well-established methods for both health and finance math.
Any device
Works great on phone, tablet and computer.