Calculator Clash
Quick-fire rounds: answer as many as you can, build a combo, and beat your best. Play against the clock or with no timer at all, with a calculator or in your head.
Daily challenge
Today's 10
The same 10 mixed questions for everyone today, with no timer. A new set every day.
Build a round
No best score for this round yet.
How to play
- Choose a calculator round or mental math, then a topic and a round: 60 seconds, 90 seconds, 2 minutes, or 10 or 20 questions with no timer.
- Each question gets one try. Right or wrong, the next one appears straight away, and you see the right answer for the one you missed.
- Each right answer scores 10 points. Three in a row starts a combo: ×2 from 3 in a row, ×3 from 6, and ×4 from 10. A miss or a skip resets it.
- An answer in the wrong form (like 0.15 when the question wants a percent) doesn't count against you. You're told what to fix.
- At the end, every question you missed has its worked solution, so you can see how it's done.
Fair timing
The clock only runs while the question is on your screen. Switch tabs, or press Pause, and it stops (paused questions are hidden). A slow phone or a busy computer never costs you time.
The daily challenge
Every day there's a new set of 10 mixed questions, the same for everyone, with no timer. Play it as often as you like: your best score for the day is kept.
Where the answers come from
Every question is worked out by the same calculators you can use on this site:
- Basic calculator calculator
- Percentage calculator
- Discount calculator
- Tip calculator
- Sales tax calculator
Your scores
Personal bests are saved in this browser only, separately for each topic, round and way of playing. No account, and nothing about your answers is sent anywhere.