Formula selection
Using established scientific relationships
Calculator formulas are based on accepted scientific relationships, standard terminology, and commonly used equations.
Validation process
Testing calculations and examples
Calculator logic is tested using representative values, boundary cases, invalid inputs, and expected results to improve reliability. Each calculator is designed to present formulas, assumptions, units, and limitations clearly so users can understand the scientific basis of each result.
Educational approach
Explaining the science behind results
Pages include formulas, variables, units, examples, and explanations so learners understand how calculations work.
Related standards
Transparency and review
Read our editorial policy and meet our review team.