Calculated using standard mathematical and industry formulas.
Free online Grade Calculator calculator and unit conversion tool for everyday, engineering, and home projects.
How to use this calculator?
Select mode.
Enter scores and weights.
Read overall grade or needed final exam score.
Formula & calculation method
Weighted Average
Grade = Σ(Score × Weight) / Σ(Weight)
Class average math.
Step-by-step calculation example
80% at 70% + 90% at 30% = 83%.
Key insights to remember
Weighted final exam heavily affects final grade.
How to interpret your results?
Grade Needed
Minimum exam score needed for target.
Frequently asked questions
How do I use the Grade Calculator calculator?
Enter your numerical input and select desired units to get instant accurate results.
How accurate are the conversions?
Conversions use official ISO conversion factors for maximum precision.
Does it convert metric and imperial units?
Yes, seamless conversions between metric (meters, kg) and imperial (feet, lbs) are supported.
Is my data stored?
No, all calculations execute 100% locally in your browser with zero data logging.
Can I use this for DIY or engineering projects?
Yes, it provides reliable estimates for construction, crafting, science, and everyday math.
What if I enter invalid inputs?
The calculator will display a friendly error prompt if non-numeric values are entered.
Related calculators
GPA Calculator: College Grade Point Scale — Calculate your semester and cumulative GPA on the standard 4.0 scale. Convert letter grades to quality grade points and track graduation honors with credit weights.
Percentage Calculator: 3-Way Percent Change — Free online percentage calculator: calculate percentage of a number, percentage increase or decrease, discount prices, and relative change between values.