Everyday & Practical Calculators
Practical calculators for everyday life — tips, dates, BMI, fuel, salary and more. Enter your numbers and see the result explained with a clear visual.
View all calculatorsUnit Converter
Visual unit conversion
Tip & Bill Splitter
Split bills and tips instantly
Discount Calculator
See how much you save
Speed / Distance / Time
D = R × T solved visually
Age Calculator
Exact age from any date
Date Difference
Days between any two dates
BMI Calculator
BMI with health-zone gauge
Fuel Cost Calculator
Trip fuel cost visualized
Pace Calculator
Pace / distance / time solver
Sleep Calculator
Wake up between sleep cycles
Salary Calculator
Pay rate converter
TDEE / Calorie Calculator
BMR and TDEE from body stats
Electricity Cost Calculator
Power bill estimator
GPA Calculator
Weighted GPA from grades
Final Grade
Find the final-exam score needed to hit a target course grade
Business Days
Count business days (Mon-Fri) between two dates
Time Duration
Add or subtract two HH:MM:SS durations
Countdown
Count down to (or from) a target date and show days, hours, minutes
Work Hours & Time Card
Track daily hours worked and compute weekly pay
Unit Price & Best Deal
Compare price per unit across packages to find the cheapest deal
Budget Percentage Planner
Split a budget by percentages across categories with overage warnings
Map Scale Calculator
Convert between map distance and real-world distance using a representative fraction
Roof Pitch Calculator
Convert between rise/run, slope angle, and standard pitch labels
Stair Calculator
Plan stair rise, run, and tread depth with code-friendly guidance
Paint Coverage Calculator
Estimate gallons of paint needed for a room with deductions and coats
Tile Calculator
Estimate tile count and boxes for a floor or wall with waste margin
DMS Coordinate Converter
Convert latitude/longitude between decimal degrees and degrees-minutes-seconds
Bearing & Distance Calculator
Great-circle distance and bearing between two latitude/longitude points
Concrete Volume & Bags
Volume of slabs and columns plus bag count by yield
Tire Size Comparator
Parse and compare tire size codes like 225/45R17 by diameter and revs
Gear Ratio & RPM
Engine RPM, gear ratio, final drive, and tire diameter into vehicle speed
Time Zone Converter
Convert a time across IANA time zones using built-in Intl.DateTimeFormat
Recipe Scaler
Scale a recipe up or down by servings, with automatic ingredient unit conversion.