All Formulas
Explore formula guides that explain the equations, variables, and assumptions behind each calculator.
210 Formulas
Supporting formulas across every calculator category.
A/B Testing Website Load Time FormulaLearn how to calculate per-page load-time improvement and total monthly visitor waiting time saved when variant...View formula→A/B Testing Website Load Time Per-User FormulaLearn how to calculate per-user load-time savings, percentage change, traffic-weighted test load time, and cumul...View formula→Absence Rate FormulaLearn how to calculate an employee absence rate from absence days, average headcount and scheduled working days.View formula→Annual Absence Budget FormulaLearn how an annual absence budget is estimated from payroll, employer on-costs, expected absence, and replaceme...View formula→Absence Rates Budget FormulaLearn how to estimate annual employee absence days, lost-time cost, and a paid-cover budget.View formula→Individual Absence Rate Budget FormulaLearn how to calculate an annual absence-day budget, remaining days, current absence rate, and projected year-en...View formula→Team Absence Budget FormulaLearn how to calculate a team's annual absence-day allowance, estimated absence cost, and variance from a target...View formula→Absence Rates Capacity FormulaLearn how to estimate available staff hours and staff-equivalent capacity after applying an expected absence rate.View formula→Absence Rates Capacity (Individual) FormulaLearn how to calculate an individual's available workdays, productive hours, absence rate and effective annual c...View formula→Team Absence Capacity FormulaLearn how to calculate available team hours, workdays, and average staffing after an expected absence rate is de...View formula→Annual Absence Cost FormulaLearn how to estimate annual employee absence costs from workforce size, absence rates, daily employment cost an...View formula→Absence Rates Cost FormulaLearn how annual employee absence cost is estimated from lost days, fully loaded pay and paid replacement cover.View formula→