This user-friendly online handedness assessment tool is developed with JavaScript.
It is based on the Edinburgh Handedness Inventory (Oldfield, 1971).

After you use the mouse to indicate your preference for the ten items in the table, your handedness score will be automatically calculated.
Please indicate which hand you prefer for each of the following activities.

Task	Preference	Left	Right
1. Writing	<Choose one> Right hand strongly preferred Right hand preferred No preference Left hand preferred Left hand strongly preferred
2. Drawing	<Choose one> Right hand strongly preferred Right hand preferred No preference Left hand preferred Left hand strongly preferred
3. Throwing	<Choose one> Right hand strongly preferred Right hand preferred No preference Left hand preferred Left hand strongly preferred
4. Using scissors	<Choose one> Right hand strongly preferred Right hand preferred No preference Left hand preferred Left hand strongly preferred
5. Brushing teeth	<Choose one> Right hand strongly preferred Right hand preferred No preference Left hand preferred Left hand strongly preferred
6. Using a knife (without a fork)	<Choose one> Right hand strongly preferred Right hand preferred No preference Left hand preferred Left hand strongly preferred
7. Using a spoon	<Choose one> Right hand strongly preferred Right hand preferred No preference Left hand preferred Left hand strongly preferred
8. Using a broom (dominant hand)	<Choose one> Right hand strongly preferred Right hand preferred No preference Left hand preferred Left hand strongly preferred
9. Striking a match	<Choose one> Right hand strongly preferred Right hand preferred No preference Left hand preferred Left hand strongly preferred
10. Opening a jar	<Choose one> Right hand strongly preferred Right hand preferred No preference Left hand preferred Left hand strongly preferred
Total		0	0

Your Handedness Score
Unknown (Finish the ten items to see your score.)

-100 Pure left hander

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-50 Mixed left hander

<--

0    Neutral

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+50 Mixed right hander

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+100 Pure right hander

Handedness score is calculated using this formula: 100*((Right - Left) / (Right + Left)).


Citations:
Oldfield, R.C. (1971). The assessment and analysis of handedness: the Edinburgh inventory. Neuropsychologia, 9(1), 97-113.
Zhang, Y. (2014). Online tool for handedness assessment. Retreived from http://zhanglab.wikidot.com/handedness
PDF file: http://gade.psy.ku.dk/Readings/Oldfield1971.pdf