Typical scale: A 90–100%, B 80–89%, C 70–79%, D 60–69%, F below 60. You can adjust the cutoffs in the tool.

Do I enter points or percentage?

Enter points earned and total points; the tool computes percentage and assigns the letter.

What if total points is zero?

Total points cannot be zero; the tool will show an error.

Convert a score or points to a letter grade based on a percentage scale.

Points earned

Total points

What scale is used?: Typical scale: A 90–100%, B 80–89%, C 70–79%, D 60–69%, F below 60. You can adjust the cutoffs in the tool.
Do I enter points or percentage?: Enter points earned and total points; the tool computes percentage and assigns the letter.
What if total points is zero?: Total points cannot be zero; the tool will show an error.

Celsius to Fahrenheit Converter

Convert Celsius to Fahrenheit and Fahrenheit to Celsius instantly. Free temperature converter.

Tip Calculator

Calculate tip and split the bill. Enter bill amount, tip percentage, and number of people.

Roman Numeral Converter

Convert numbers to Roman numerals and Roman numerals to numbers. Supports 1–3999.

Combinations Calculator

Calculate C(n,r) — the number of ways to choose r items from n without order. Uses n!/(r!(n-r)!).

Combinations with Replacement Calculator

Calculate the number of ways to choose r items from n with repetition allowed. Formula: C(n+r-1, r).

Even Permutations Calculator

Count how many permutations of n objects are even (expressible as an even number of swaps). For n ≥ 2, equals n!/2.