Everyday Calculators
Age & date differences and road-trip fuel cost sharing.
Age & Date Difference
Exact age in years, months & days, total days lived and next birthday.
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Fuel & Trip Cost
Trip gas budget, cost per person split, fuel used and efficiency.
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Days Between Dates
Count days, weeks, months and business days between two dates.
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Tip Calculator
Tip amount, total and per-person split for any bill.
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Discount Calculator
Sale price and money saved from a percentage discount.
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GPA Calculator
Weighted grade point average from your courses and credit hours.
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Password Generator
Create strong, random passwords with custom length and character sets.
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Roman Numeral Converter
Convert between numbers and Roman numerals in either direction.
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Hours Calculator
Time worked between two times minus breaks, in hours & decimal hours.
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Date Add / Subtract
Add or subtract days, weeks and months from any date to find a new date.
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Day of the Week
Find the weekday, day of year and week number for any date.
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Countdown Calculator
Days, weeks and hours remaining until (or since) any date.
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Electricity Cost
Daily, monthly and yearly running cost of any electrical appliance.
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Grade Calculator
Convert points earned into a percentage and letter grade.
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Final Grade Calculator
The score you need on the final exam to hit your target grade.
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Unit Price Comparison
Compare two products by price per unit to find the better value.
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Speed, Distance & Time
Solve for speed, distance or time given the other two.
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Subnet Calculator
IPv4 network, broadcast, mask, host range and usable hosts from CIDR.
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Gas Mileage (MPG)
Miles per gallon from distance driven and fuel used, with L/100km.
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Time Duration Calculator
Duration between two dates and times in days, hours and minutes.
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Age Difference Calculator
The age gap between two people in years, months and days.
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Dog Age Calculator
Your dog's age in human years using the science-based formula.
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Cat Age Calculator
Your cat's age in human years and life stage.
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Reading Time Calculator
How long a text takes to read and to speak aloud.
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Business Days Calculator
Count business (weekday) days between two dates.
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Lottery Odds Calculator
Your odds of winning a pick-k-of-n lottery jackpot.
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Tip & Bill Splitter
Total a bill from item prices, add tip and tax, and split per person.
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Gas Trip Cost
Fuel cost of a trip from distance, MPG and fuel price.
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Pizza Party Calculator
How many pizzas to order for a group by slices per person.
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Next Birthday Countdown
Days until your next birthday and the age you'll turn.
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Parking Cost Calculator
Total parking cost from hourly rate, hours and a daily maximum.
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Tips Hourly Wage
Your effective hourly pay when base wage and tips are combined.
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Roman Numeral Date
Convert any date into Roman numerals for tattoos, monuments and design.
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Wind Chill Calculator
The 'feels like' temperature from air temp and wind speed (NWS formula).
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Heat Index Calculator
The 'feels like' temperature from heat and humidity with a risk level.
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