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 calculators- Unit ConverterVisual unit conversion
- Tip & Bill SplitterSplit bills and tips instantly
- Discount CalculatorSee how much you save
- Speed / Distance / TimeD = R × T solved visually
- Age CalculatorExact age from any date
- Date DifferenceDays between any two dates
- BMI CalculatorBMI with health-zone gauge
- Fuel Cost CalculatorTrip fuel cost visualized
- Pace CalculatorPace / distance / time solver
- Sleep CalculatorWake up between sleep cycles
- Salary CalculatorPay rate converter
- TDEE / Calorie CalculatorBMR and TDEE from body stats
- Electricity Cost CalculatorPower bill estimator
- GPA CalculatorWeighted GPA from grades
- Final GradeFind the final-exam score needed to hit a target course grade
- Business DaysCount business days (Mon-Fri) between two dates
- Time DurationAdd or subtract two HH:MM:SS durations
- CountdownCount down to (or from) a target date and show days, hours, minutes
- Work Hours & Time CardTrack daily hours worked and compute weekly pay
- Unit Price & Best DealCompare price per unit across packages to find the cheapest deal
- Budget Percentage PlannerSplit a budget by percentages across categories with overage warnings
- Map Scale CalculatorConvert between map distance and real-world distance using a representative fraction
- Roof Pitch CalculatorConvert between rise/run, slope angle, and standard pitch labels
- Stair CalculatorPlan stair rise, run, and tread depth with code-friendly guidance
- Paint Coverage CalculatorEstimate gallons of paint needed for a room with deductions and coats
- Tile CalculatorEstimate tile count and boxes for a floor or wall with waste margin
- DMS Coordinate ConverterConvert latitude/longitude between decimal degrees and degrees-minutes-seconds
- Bearing & Distance CalculatorGreat-circle distance and bearing between two latitude/longitude points
- Concrete Volume & BagsVolume of slabs and columns plus bag count by yield
- Board Foot CalculatorLumber board feet and cost
- Tire Size ComparatorParse and compare tire size codes like 225/45R17 by diameter and revs
- Gear Ratio & RPMEngine RPM, gear ratio, final drive, and tire diameter into vehicle speed
- Time Zone ConverterConvert a time across IANA time zones using built-in Intl.DateTimeFormat
- Recipe ScalerScale a recipe up or down by servings, with automatic ingredient unit conversion.
- TDEE & MacrosDaily calorie needs and a macronutrient split