Sig Fig Guides
Sig Fig Guides
Everything you need to master significant figures. Start with the counting rules, then learn how to apply them in calculations.
Complete Sig Fig Rules
Master all 5 rules for counting significant figures. The foundation for everything else.
Non-zero digitsZeros between digitsLeading zerosTrailing zerosScientific notation
How Many Significant Figures?
50+ examples showing how many sig figs are in any number. Quick answers with explanations.
50+ examplesDecimalsZerosScientific notationPractice problems
Rounding Significant Figures
Learn how to round to any number of sig figs. Step-by-step process with examples.
3-step processRound up vs downCommon mistakesPractice problems
Addition & Subtraction Rules
Learn how to add and subtract with sig figs. Focus on decimal places, not sig fig count.
Decimal place ruleStep-by-step examplesCommon mistakesMixed operations
Multiplication & Division Rules
Master multiplying and dividing with sig figs. Round to the fewest significant figures.
Sig fig countingDivision examplesScientific notationExact numbers
Recommended Learning Path
Follow this order for the best understanding
1
Counting Rules2
Addition Rules3
Multiplication Rules4
Practice!Quick Tools