Time Duration Calculator: Hours, Minutes, Days & Seconds
There are times when you look around the room after a meeting and aren’t sure whether it ended fifteen minutes ago or forty-five. Sometimes time … Read More
JSCalc
Tire Size Calculator for Diameter and Speed Error
Most of us don’t change tires because we need new rubber. We do it for looks, or because we want narrower sidewalls for better gas … Read More
Percentage Difference Calculator for Error and Change
Sometimes you may compare two things only to realize you’ve made a mistake with how you calculated the percent, choosing the incorrect base. It’s more … Read More
Percentage Increase Calculator for Growth and CAGR
Numbers are nice, especially when they’re on the right side of the ledger. Raw numbers don’t always convey much. How many hours have you spent … Read More
Time Zone Converter With DST and Meeting Hours
Time zones aren’t mere lines on a map. They’re complex political systems that change throughout the seasons. Set an event for 10am and think it’s … Read More
Blood Alcohol Percentage Calculator for BAC Estimates
You’ve had two beers over an hour. You’re wondering whether or not you should attempt driving home. It’s an important question but it never has … Read More
Mortgage Calculator With Taxes, PMI, HOA, and Extra Pay
It’s easy to get swept away by home’s sticker price, that number seem so reasonable! But that’s not what hits your bank account month after … Read More
Pregnancy Due Date Calculator by LMP, IVF, Scan
You want accuracy in a process where there’s a lot of biological variability, so you get anxious waiting for due date: one date from your … Read More
Retirement Calculator for Savings Projection and Gap
When most people think about retirement, they’re thinking about a magic number. On that last day you punch out for good, they’d like to be … Read More
Age Calculator With Birthday Countdown
Subtracting two isn’t enough; there’s a bit more to knowing your real age. On paper it’s easy, but subtracting two years from each other isnt … Read More