Handwriting Math Calculator
Confirm the expression before calculating
Build and check the math expression
Result
Calculation summary
Enter values to see the result
Mouse, touch and stylus input
Write the complete expression
Write an expression as you would on paper
Write from left to right and leave a little space between characters. An ending equals sign triggers calculation.
Complete expression candidates
Local structural features, personal samples and point-cloud matching
Complete expression candidates will appear here after you write.
After a short pause, the line is segmented and copied into the expression field. Review each character; confirmed corrections teach this browser your handwriting.
How to use this calculator
- 1Write the complete expression from left to right with a mouse, finger or stylus, leaving a little space between characters.
- 2After pausing, review the complete expression and choose the correct digit or symbol for each segment.
- 3Use the confirmed expression to calculate. Corrected shapes stay in this browser and improve later recognition.
Formula
recognized ink → confirmed expression → safe parser → numeric result
Ink recognition and mathematical evaluation are separate so an uncertain symbol can be corrected before it changes the answer.
Calculation steps
- Capture each pointer stroke and cluster strokes into characters using horizontal overlap and proximity.
- Combine loops, tail direction, stroke count, point-cloud shape and examples saved in this browser, then rank complete expressions with mathematical syntax.
- Let the user correct each character, then parse the confirmed expression with explicit mathematical grammar rather than executing code.
Worked example
Writing 3 + 4 = on one line produces four character segments, combines them as 3+4= and returns 7.
Assumptions
- The expression is written from left to right with distinguishable spacing between adjacent characters.
- The user confirms or corrects ambiguous recognition.
- Percent is interpreted as division by 100.
- Trigonometric inputs use the selected degree or radian mode.
Sources
Frequently asked questions
Does handwriting leave my device?
Local recognition and calculation do not send ink to SuCalc or a third-party service. A compatible browser may use its own operating-system handwriting capability.
Why should I leave a little space between characters?
The tool segments ink by horizontal position. Spacing separates adjacent characters while overlapping strokes still combine into symbols such as +, = and ÷.
Which symbols are recognized?
Digits, decimal point, four arithmetic operators, slash, parentheses, equals, percent, power, square root, pi and factorial are included.
Can I calculate trigonometric functions?
Yes. Insert sin, cos, tan, ln or log from the symbol panel and choose degrees or radians.