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Explore formula guides that explain the equations, variables, and assumptions behind each calculator.
465 Formulas
Supporting formulas across every calculator category.
PC Power Supply Annual Cost FormulaLearn how annual PC power supply energy use, electricity cost, and savings are calculated from load, efficiency,...View formula→A/B Testing PC Power Supply Calculator FormulaLearn how the calculator estimates reserved PC power demand, PSU load, spare capacity, and the PSU rating needed...View formula→PC Power Supply Monthly Cost FormulaLearn how monthly PC electricity use and cost are estimated from component load, PSU efficiency, daily hours, an...View formula→A/B Testing PC Power Supply FormulaLearn how the calculator estimates PSU capacity, power headroom, and PSU load for two individual PC configurations.View formula→A/B Testing Sample Size FormulaLearn how an annual A/B testing sample size estimate is calculated from conversion rate, target lift, confidence...View formula→A/B Testing Sample Size FormulaLearn how an A/B testing sample size calculator estimates visitors per variation, total traffic, and test durati...View formula→A/B Testing Sample Size FormulaLearn how an A/B test sample size and estimated monthly test duration are calculated from conversion rate, uplif...View formula→A/B Testing Screen Resolution Annual FormulaLearn how annual screen-resolution traffic, sample size, and test capacity are estimated for an A/B conversion t...View formula→A/B Testing Screen Resolution Calculator FormulaLearn how screen-resolution segment traffic, visitor allocation, test duration, and expected conversions are est...View formula→A/B Testing Screen Resolution Monthly FormulaLearn how eligible traffic, sample size, and estimated test duration are calculated for a screen-resolution A/B...View formula→A/B Testing Screen Resolution Per-User FormulaLearn how to estimate the number of users required in each A/B test variation for a conversion-rate experiment.View formula→A/B Testing SLA Annual FormulaLearn how annual downtime allowance, effective availability, and remaining downtime budget are calculated for an...View formula→