Welcome to Grinebiter
Welcome to Grinebiter. We hope you will find our collections interesting, and our calculators and converters useful and helpful.
What Number Calculator
If you take x percent of a number and get y, then what is that number?
Sum of Digits Calculator
Here you can enter any number to calculate sum of its digits.
cm in height converter
Need to know cm in height? No problem! Just go here.
Random Integer Generator
Here is the best online Random Integer Generator. It can generate positive and negative random integers.
The fastest and best online Factoring Calculator.
Our Number Lookup gives you tons of interesting information about the number of your choice.
Here you can look up the monthly calendar for any month in any year, whether it's in the past or the future.
Convert one coin denomination to another denomination while keeping the same value.