Grade calculator
Convert raw marks to percentages and letter grades instantly.
Runs in your browserFree — no signup
How to use Grade calculator
Grade calculator converts raw marks into a percentage and letter grade instantly, and shows exactly how many points are needed to reach 60–90% — handy when marking at the kitchen table or answering 'what do I need to pass?'
Step by step
- 1Set your duration and options.
- 2Choose sound behaviour — ticking, per-minute chimes or an end alarm only.
- 3Press start, then go fullscreen so the whole room can see it.
- 4Pause, reset or add time at any point without losing your setup.
What to expect
- Large, high-contrast display that reads clearly from the back of a room.
- No ads, no video player, no unexpected autoplay — unlike using a video site.
- Keeps running accurately even if the tab is in the background.
Common use cases
- Timeboxing group exercises in a workshop.
- Exam, quiz and presentation timing.
- Stand-ups, retrospectives and lightning talks.
- Focus and break intervals while studying.
Privacy & data
Runs entirely in your browser. No account, no tracking of your session.
Frequently asked questions
Related tools — send your output onward