Tools
Practice reading an instrument or run a calculation right in the browser, with the work shown at every step.
Graduated cylinder reader
Practice reading a graduated cylinder at eye level, with a new randomized cylinder each try.
Percent error calculator
Enter an experimental and accepted value to see the percent error formula worked out line by line.
Density calculator
Enter mass and volume, or use water displacement, to calculate density with the formula shown.
Triple beam balance reader
Practice reading a triple beam balance by sliding three riders on a randomized mass.
Metric conversion tool
Convert between common metric length, mass and volume units with the conversion shown step by step.
Significant figures counter
Type a number to see which digits are significant and why, following the standard counting rules.
Variable spotter
Read a short experiment scenario and identify the independent, dependent and controlled variables.
Hypothesis builder
Fill in the if-then-because template to build a testable hypothesis for your own experiment.
Graph paper maker
Generate and print graph paper with the grid size, line weight and paper size you choose.
Lab report builder
Fill in each section of a lab report on screen, then print a clean copy with all your answers.