Calculator directory
Calculators
Browse 26 lightweight calculators for common money, work, health, time, and everyday decisions.
Money
8 calculators
Mortgage Affordability
Estimate a home price and mortgage payment from income, debt, and down payment.
- Home price estimate
- Monthly payment target
- Debt ratio guidance
Credit Card Payoff
Estimate how long a credit card balance may take to pay off with fixed payments.
- Payoff timeline
- Interest estimate
- Low-payment warning
Loan Payment
Estimate monthly loan payments, total interest, and total paid.
- Monthly payment
- Total interest
- Total paid
Savings Goal
Estimate how long it may take to reach a savings goal.
- Months to goal
- Contributions needed
- Interest estimate
Emergency Fund
Estimate a target emergency fund from monthly expenses.
- Target fund size
- Savings gap
- Months to save
Simple Interest
Calculate simple interest from principal, rate, and time.
- Interest amount
- Ending balance
- Simple formula
Debt-to-Income
Estimate your debt-to-income ratio from monthly income and debt payments.
- DTI ratio
- Debt payment share
- Simple lender-style metric
Rent vs Buy
Compare monthly renting cost with a simplified monthly buying cost.
- Monthly comparison
- Buy cost estimate
- Rent difference
Work
5 calculators
Salary Calculator
Convert annual salary into hourly, monthly, weekly, and daily gross pay.
- Hourly rate
- Monthly and weekly pay
- Gross pay context
Hourly to Salary
Convert hourly pay into estimated annual, monthly, and weekly gross pay.
- Annual pay
- Monthly pay
- Weekly pay
Overtime Pay
Estimate weekly gross pay with overtime hours.
- Regular pay
- Overtime pay
- Weekly gross pay
Freelance Rate
Estimate a target freelance hourly rate from income goals and billable time.
- Target hourly rate
- Expense coverage
- Billable hours
Work Hours
Calculate daily work hours from start time, end time, and break length.
- Daily hours
- Decimal hours
- Optional gross pay
Health
5 calculators
BMI Calculator
Calculate body mass index from height and weight using US units.
- BMI value
- Adult category
- US unit inputs
Calorie Deficit
Estimate daily calories from maintenance calories and a target deficit.
- Daily target
- Weekly deficit
- Estimated weekly loss
Water Intake
Estimate daily water intake from body weight and activity.
- Daily ounces
- Cup estimate
- Activity adjustment
Ideal Weight
Estimate a healthy adult weight range from height using BMI ranges.
- Weight range
- BMI-based estimate
- US unit inputs
Protein Intake
Estimate daily protein targets from body weight.
- Daily grams
- Lower target
- Higher target
Time
4 calculators
Date Difference
Calculate the number of days between two calendar dates.
- Total days
- Weeks and days
- Date planning
Age Calculator
Calculate age in years and approximate total days.
- Age in years
- Total days
- As-of date
Time Duration
Calculate elapsed time between two times.
- Duration hours
- Duration minutes
- Overnight support
Days Between Dates
Find calendar days between two dates.
- Date difference
- Quick planning
- Time category starter
Everyday
4 calculators
Tip Calculator
Calculate a tip, bill total, and per-person split.
- Tip amount
- Total bill
- Split per person
Unit Price
Compare price per unit for everyday purchases.
- Price per unit
- Package comparison
- Shopping math
Discount Calculator
Calculate sale price and savings from a percentage discount.
- Sale price
- Savings amount
- Percent-off math
Sales Tax
Estimate sales tax and total price from a tax rate.
- Tax amount
- Total price
- Simple checkout estimate