Sample Size Calculator: Margin of Error & Confidence
So, how do I recruit? You want a specific answer with little means of getting it. How many response will be enough to produce valid … Read More
JSCalc
Hourly to Annual Salary Calculator With Pay Periods
Your offer letter appears impressive. But when you attempt to plug it in to the rent check, it’s all smoke and mirrors. That year-long number … Read More
DC Voltage Drop Calculator for 12V 24V 48V Wiring
Think of it like this: Your camp fridge goes dead. Why? Because voltage dropped as the battery’s voltage sagged under the load. There was still … Read More
Weight Percentile Calculator for Kids and Adults
If you’ve ever been to a pediatrician’s office, you’ve likely glanced at a growth chart hanging on the wall. Those spaghetti-like tangles appears to be … Read More
BMX Gear Ratio Calculator: Gear Inches & Rollout
Using this calculator allows you to see how the choices you make with your equipment impact your ride. I’ve talked to folks who talk about … Read More
Binomial Probability Calculator: P(X=k), ≤k, ≥k
Binomial probability tells you whether you have a certain number of defects, and whether that is normal or a cause for concern. It works under … Read More
Confidence Interval Calculator (Mean & Proportion, z/t)
Uncertainty comes in form of confidence intervals: a range within which it’s likely that true number lies given our small amount of data. The plus … Read More
Pressure Altitude Converter With Density Altitude
Enter your local barometer into the calculator (above) and you has your pressure altitude…all without having to do any math in your head. Waiting for … Read More
Velocity Banking Calculator: HELOC Payoff & Interest Saved
Sounds pretty clever right? This is called velocity banking, and it looks like an accountant’s head-spinning attempt at financial trickery. Here’s the basic concept: use … Read More
Semester GPA Calculator: Term & Cumulative GPA Tool
Anxiety grips you when you see your syllabus and wonder what kind of shape you’re going to be in academicaly. Worry becomes fact when you … Read More