Stardate Moon Phase Calculator
Two things are answered at once by this calculator on page. For the date you input, it displays Moon’s phase, how illuminated it is, and … Read More
JSCalc
Orbital Period Calculator
One of the oldest questions in astronomy is “how long does it take for something to go around?” That’s what my orbital period calculator above … Read More
Time Duration Calculator Hours
It’s a source of anxiety on every Friday afternoon: I don’t know how many hour I’ve worked. There are gaps in my timesheet. My mind … Read More
Business Days Between Two Dates Calculator
The common understanding of a business day is “Anyday that’s not Saturday or Sunday.” Sure, go ahead and begin there; but that fails to account … Read More
Horsepower Calculator (Engine HP from Torque and RPM)
If you’ve ever debated power output with another person who claims that torque make a vehicle move, well then you’re both correct. Depending on which … Read More
Invoice Due Date Calculator
When an invoice is dated the last week of May with Net 30 terms, it doesn’t land in late June. It arrives in mid-June: the … Read More
Break-Even Mortgage Point Calculator
The closing table typically isn’t a negotiating table. There’s always pressure to sign. It is often a race to the signature line involving pile of … Read More
Net Profit Margin Calculator
We all know the dreaded question that every business owner has to ask themselves at some point. After costs are accounted for, how much of … Read More
Sales Profit Margin Calculator
If you’re seeing those sales numbers rolling in, but you’re still out of money come the end of the month there’s a certain type of … Read More
WHO Percentile Calculator for Child Growth (0-5 Years)
It is the scale. That’s where you begin. There is a number. Maybe it’s low. Maybe it’s high. So you check growth charts. Are your … Read More