50 Daily Calculators
Finance, health, time, and conversions — modern, mobile-first. Tap a card to open a calculator.
🧍 BMI Calculator
Calculate your Body Mass Index using metric units.
Enter your weight and height, then tap Calculate.
🎂 Age Calculator
Find your exact age in years, months, and days.
Pick your birth date and tap Calculate.
💵 Loan Calculator
Enter loan terms and tap Calculate.
🏠 Mortgage Calculator
Fill the fields and tap Calculate for monthly cost.
% Percentage Calculator
Compute a percentage, increase, and decrease.
🛒 Discount Calculator
See discounted and final price after tax.
📅 Date Calculator
Find difference and add days to a date.
🧾 Tax Calculator
Quick flat-rate estimate (not tax advice).
🎓 GPA Calculator
Enter grades and credits for up to six courses.
💱 Currency Converter
Static sample rates. Update in code for live rates.
📊 Simple Interest
Simple: I = P × R × T.
📈 Compound Interest
FV = P(1+r/n)^(n·t) + monthly series.
👴 Retirement Calculator
Monthly compounding; shows future and today’s value.
🍎 Calorie Calculator
Mifflin–St Jeor BMR with activity multiplier.
⚡ BMR Calculator
Basal Metabolic Rate (Mifflin–St Jeor).
💪 Body Fat Calculator
US Navy body fat estimate.
🤰 Pregnancy Due Date
Estimate due date from last menstrual period.
🌸 Ovulation Calculator
Approximate fertile window centered on ovulation.
⚖️ Ideal Weight Calculator
Devine formula for adults.
🏃 Pace Calculator
Get pace per km and average speed.
🏅 Running Distance
Compute distance from time and pace.
🚗 Speed Calculator
Average speed in km/h and m/s.
⏱️ Time Calculator
Add or subtract times.
⌛ Hours Calculator
Work duration minus breaks.
💳 Tip Calculator
Tip and split per person.
🍽️ Split Bill
Split check including tax and tip.
💼 Salary Calculator
Estimate gross and net pay.
📉 Inflation Calculator
Adjust for inflation over time.
💰 Savings Calculator
Growth with monthly compounding.
📊 Investment Calculator
Future value of a lump-sum investment.
📈 ROI Calculator
Return on investment as a percentage.
🏦 EMI Calculator
Equated Monthly Installment (EMI).
🏘️ Home Affordability
Based on 28/36 rule (guideline).
📊 Break-even Calculator
Units needed to cover fixed costs.
📉 Profit Margin
Margin and markup from revenue and cost.
🏷️ Sales Tax Calculator
Add tax to a price.
🔄 Unit Converter
Quick multi-category converter.
📏 Length Converter
Convert between length units.
⚖️ Weight Converter
Convert between weight units.
🌡️ Temperature Converter
Convert between °C, °F, and Kelvin.
📐 Area Converter
Area conversions (m², ft², acres, etc.).
🧪 Volume Converter
Volume conversions (L, mL, gal, etc.).
⛽ Fuel Efficiency
Shows L/100km and MPG (US).
🚘 Car Loan Calculator
Estimated payment with taxes and fees.
📉 Debt Payoff Calculator
Months to payoff and total interest.
💳 Credit Card Payoff
Compute months or required payment.
🕒 Work Hours Calculator
Total weekly work hours.
💼 Overtime Pay Calculator
Regular vs overtime pay breakdown.
💧 Water Intake Calculator
Daily water recommendation in liters.
😴 Sleep Calculator
Suggested times based on 90-min cycles.