StatCalc Pro
Free Statistics & Science Calculators for Students
Get step-by-step explanations and accurate calculations for your STEM homework. 100% free, mobile-optimized, and privacy-focused.
Standard Deviation Calculator
Calculate sample or population standard deviation with step-by-step work shown. Includes variance, mean, and full calculation steps.
Scientific Notation Calculator
Convert between standard, scientific, E-notation, and engineering notation. Handles very large and very small numbers.
Mean, Median, Mode Calculator
Calculate measures of central tendency for your dataset. Includes mean, median, mode, and range with step-by-step explanations.
Variance Calculator
Calculate sample or population variance with step-by-step work shown. See the relationship between variance and standard deviation.
Significant Figures Calculator
Count sig figs, round to specific significant figures, and perform arithmetic with proper sig fig rules. Perfect for chemistry and physics labs.
Why StatCalc Pro?
Show Your Work
Step-by-step calculations help you learn, not just get answers
Mobile Optimized
Works perfectly on your phone for homework on the go
Privacy First
All calculations run in your browser - no data sent to servers
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