Directory
All calculators
110 polished mini-apps. Pick one — or search by name.
System tools · CalcLife preview
Go beyond one calculator: see your money system in one connected view.
Income, expenses, debt, savings, housing, transportation, and runway — private and client-side.
Math
Percentages, fractions, ratios — the everyday number-crunching toolkit.
math
PopularBasic Calculator
Add, subtract, multiply, divide.
math
Scientific Calculator
Trig, logs, powers — the full toolkit.
math
PopularPercentage Calculator
What's X% of Y, instantly.
math
Percent Change Calculator
Increase or decrease, in percent.
math
Fraction Calculator
Add, subtract, multiply, divide fractions.
math
Average Calculator
Mean, median, sum — paste any list.
math
Ratio Calculator
Solve and simplify ratios in seconds.
math
Square Root Calculator
√ for any number, plus powers.
math
Random Number Generator
Pick a random number in any range.
math
Rounding Calculator
Round to any decimal or step.
Time & Date
Ages, durations, time zones, countdowns — anything you measure in time.
time
PopularAge Calculator
How old are you — to the day.
time
Date Calculator
Add or subtract days from a date.
time
Date Difference Calculator
Days, weeks, months between two dates.
time
Time Duration Calculator
Time elapsed between two clock times.
time
Hours Calculator
Total hours and minutes between times.
time
Countdown Timer
Count down to any moment.
time
Stopwatch
Lap-friendly precision stopwatch.
time
Timestamp Converter
Unix timestamps ↔ human dates.
time
Time Zone Converter
Convert times across cities.
time
Business Days Calculator
Count working days between dates.
time
Week Number Calculator
ISO week number for any date.
Money & Work
Tips, paychecks, loans, savings — calm money math for real life.
money
PopularTip Calculator
Quick tips for any bill.
money
Split Bill Calculator
Fair split with tip and tax.
money
Discount Calculator
Sale price after % off.
money
Sales Tax Calculator
Add tax to any price.
money
Work Hours Calculator
Hours per shift, including breaks.
money
Overtime Calculator
Regular and overtime pay.
money
Salary Calculator
Annual salary across pay periods.
money
Hourly to Salary Calculator
Hourly rate → annual salary.
money
Paycheck Calculator
Lite take-home estimator.
money
PopularLoan Payment Calculator
Monthly payment on any loan.
money
Mortgage Calculator
Monthly payment, total interest.
money
Interest Calculator
Simple and compound interest.
money
Savings Calculator
Watch monthly deposits grow.
money
Debt Payoff Calculator
How long until you're debt-free.
money
Credit Card Payoff Calculator
High-APR payoff time and interest cost.
money
Debt Snowball Calculator
Smallest-balance-first payoff plan.
money
Debt Avalanche Calculator
Highest-interest-first payoff plan.
money
Emergency Fund Calculator
Savings goal and timeline.
money
Salary to Hourly Calculator
Annual salary → hourly rate.
money
Time Card Calculator
One shift — hours, breaks, pay.
money
Timesheet Calculator
Weekly hours, overtime and pay.
money
Hours Worked With Lunch Calculator
Net hours after lunch break.
money
Pay Period Calculator
Pay across every period.
money
Biweekly Pay Calculator
Biweekly gross pay estimator.
money
PTO Accrual Calculator
Vacation hours earned over time.
money
Net Worth Calculator
Assets minus liabilities — your total net worth.
money
Monthly Budget Calculator
Income, expenses, and money left over.
money
50/30/20 Budget Calculator
Needs, wants, savings split from income.
money
Savings Rate Calculator
What share of income you actually save.
money
Financial Runway Calculator
How many months your savings will last.
money
Savings Goal Calculator
Monthly amount needed to hit a goal by a date.
money
FIRE Calculator
Financial-independence target and timeline.
money
Mortgage Affordability Calculator
How much house you can afford.
money
Rent vs Buy Calculator
Compare renting and buying side by side.
money
Extra Mortgage Payment Calculator
Interest saved and payoff time from extra principal.
money
Amortization Schedule Calculator
Loan breakdown by month and year.
money
Refinance Break-Even Calculator
When refinancing actually pays off.
money
Down Payment Calculator
Down payment, loan amount, and months to save.
money
Closing Cost Calculator
Estimate cash needed at closing.
money
Auto Loan Calculator
Car loan payment and total interest.
money
Car Payment Calculator
Quick monthly car payment estimate.
money
Car Affordability Calculator
How much car you can afford.
money
Lease vs Buy Car Calculator
Compare leasing and buying a car.
money
Total Car Ownership Calculator
Monthly and annual cost of owning a car.
money
Fuel Cost Calculator
Trip, monthly and annual gas cost.
money
Commute Cost Calculator
Real cost of your weekly commute.
money
Retirement Calculator
Project your retirement savings and gap.
money
401(k) Calculator
Contributions, employer match, and future balance.
money
Roth IRA Calculator
Future value of Roth IRA contributions.
money
Investment Return Calculator
Total and annualized return on an investment.
money
Inflation Calculator
Future cost and purchasing power over time.
money
Retirement Withdrawal Calculator
How long retirement savings may last.
money
Safe Withdrawal Rate Calculator
Annual and monthly income at a chosen withdrawal rate.
money
Profit Margin Calculator
Profit, margin and markup from price and cost.
money
Markup Calculator
Set selling price from cost and markup.
money
Break-Even Calculator
Units and revenue to cover fixed costs.
money
ROI Calculator
Return on investment, gain and multiple.
money
Commission Calculator
Sales commission and total pay.
money
Freelance Hourly Rate Calculator
Hourly rate from an income goal.
money
Invoice Due Date Calculator
Net 15 / 30 / 45 / 60 due dates.
money
Grocery Budget Calculator
Weekly, monthly and annual grocery cost.
money
Meal Cost Per Serving Calculator
Cost per serving of a homemade meal.
money
Price Per Unit Calculator
Compare unit prices side by side.
money
Protein Cost Per Serving Calculator
Cost per serving and per gram of protein.
money
Restaurant vs Home Meal Cost Calculator
Weekly, monthly and annual savings from cooking.
Conversions
Length, weight, temperature, cooking — convert anything in a tap.
conversions
Batch Cooking Portions Calculator
Scale batch meals into portions.
conversions
Recipe Scaler Calculator
Scale ingredients up or down by servings.
conversions
Unit Converter
All your everyday unit conversions.
conversions
Length Converter
Meters, feet, miles and more.
conversions
Weight Converter
Kilograms, pounds, ounces.
conversions
Temperature Converter
Celsius, Fahrenheit, Kelvin.
conversions
Area Converter
Square meters, acres, hectares.
conversions
Volume Converter
Liters, gallons, cups, ml.
conversions
Speed Converter
km/h, mph, knots, m/s.
conversions
Data Storage Converter
Bytes, KB, MB, GB, TB.
conversions
Cooking Measurement Converter
Cups, tbsp, tsp, ml, grams.
Health
BMI, calories, macros, hydration — informational health helpers.
health
PopularBMI Calculator
Body mass index, with range meter.
health
Calorie Calculator
Daily calorie target (TDEE).
health
Macro Calculator
Protein, carbs, fat split.
health
Body Fat Calculator
Estimate body-fat % (Navy method).
health
Water Intake Calculator
How much water you need daily.
health
BMR Calculator
Calories your body burns at rest.
health
TDEE Calculator
Daily maintenance calories from activity.
health
Lean Body Mass Calculator
Estimate lean mass and fat mass.
health
Waist-to-Height Ratio Calculator
Simple body-shape ratio.
health
Sleep Need Calculator
Bedtime from your wake time.
health
Sleep Debt Calculator
Missed sleep over recent days.
health
Heart Rate Zones Calculator
Training intensity zones from age.
health
Caffeine Cutoff Calculator
When to stop caffeine before bed.
Suggest a new calculator? Get in touch.