Absenteeism Rate Calculator
Calculate the percentage of scheduled workdays missed due to absence during a period. Enter total absence days and total scheduled workdays for the same employee group and period.
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Calculators
Calculators
Decision-support tools for sizing, cost, capacity, runtime, ownership, and other practical planning questions.
Audio Delay Distance Calculator
Estimate the one-way time for sound to travel a chosen distance through air at an assumed sound speed. This simple model excludes equipment, room reflections, and signal-processing latency.
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At Least One Success Binomial Probability Calculator
Calculate the probability of at least one success across a fixed number of independent trials with the same success probability on each trial.
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Break-Even Calculator
Estimate how many units you need to sell, and the revenue at that volume, to cover fixed costs using your price and variable cost per unit.
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Conditional Probability Calculator
Calculate the probability of event A occurring when event B is known to have occurred, using counts from the same defined group or observation set.
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Confidence Interval Calculator
Estimate a two-sided confidence interval for a population mean from a sample mean, sample standard deviation, sample size, and a selected critical z-value. This normal-approximation model assumes independent observations and a sufficiently appropriate sampling distribution.
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Contribution Margin Calculator
Calculate contribution margin by subtracting variable costs from sales revenue. Enter total revenue and total variable costs for the same period to see the amount available to cover fixed costs and contribute to operating profit.
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Employee Productivity Rate Calculator
Estimate completed work units per available work hour for a team or employee over a chosen period. Use a consistent work unit and include the hours available for that same period.
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Employee Retention Rate Calculator
Estimate the percentage of employees retained over a period using your starting headcount, hires, and separations. This simple headcount model assumes hires and departures are recorded for the same period.
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Expected Value Calculator
Estimate the expected value of a decision by multiplying each outcome value by its probability and adding the weighted outcomes. Enter probabilities as percentages and values in consistent units.
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Full Time Equivalent Calculator
Estimate full-time equivalent (FTE) staffing by dividing total planned work hours by the standard full-time hours for the same period. Enter hours for one week to express part-time and combined project capacity as FTEs.
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5-Minute Speech Word Count Calculator
Estimate how many words fit into a five-minute speech using your speaking pace and the time reserved for pauses.
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Meeting Cost Calculator
Estimate the labor cost of a meeting from participant count, average hourly compensation, meeting length, and preparation time. The estimate assumes one average hourly rate applies to every attendee.
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Net Present Value Calculator
Estimate net present value by discounting up to five expected annual cash flows and subtracting the initial investment. Assumes cash flows occur at each year-end and uses one constant annual discount rate.
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Opportunity Cost Calculator
Compare the modeled net values of a chosen option and its best alternative to estimate the value gap between them. Enter values in the same currency or other consistent units and use the same time period for both options.
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Overtime Pay Calculator
Estimate gross pay for a work period from your hourly rate, regular hours, overtime hours, and assumed overtime multiplier. This estimate does not determine whether overtime is legally owed.
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Payback Period Calculator
Estimate how many years it takes for an investment's initial cost to be recovered from its annual net cash inflow. This simple payback model assumes the same cash inflow each year and does not account for discounting, taxes, or cash flows after payback.
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Percentage Difference Calculator
Compare two positive values by expressing their absolute difference as a percentage of their average.
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Present Value Calculator
Estimate the value today of a future amount by discounting it at an annual rate with annual compounding. This simplified calculation assumes one lump-sum amount received at the end of the stated period.
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Presentation Timer
Estimate how long a presentation will take from its spoken word count, delivery pace, and planned pause time.
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Probability Calculator for Independent Events
Estimate the chance that at least one of three independent events occurs. Enter each event's probability as a percentage. This model assumes the events are independent.
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Project Contingency Hours Calculator
Estimate project contingency time by applying a contingency percentage to planned project hours. The result is a planning allowance in hours and does not predict the actual time a project will need.
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Project Cost Calculator
Estimate a planning budget from work hours, hourly labor cost, materials, and a contingency percentage. This worksheet assumes labor is billed at one rate and applies contingency to the combined labor and materials subtotal.
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Project Cost Recovery Calculator
Estimate how many months of stated monthly savings are needed to equal an upfront project cost. This simple payback estimate assumes savings remain constant and excludes other costs, timing effects, and uncertainty.
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Project Option Value Calculator
Estimate net value per option by subtracting implementation cost from expected benefit and dividing the result across the number of options. This simple model assumes benefits and costs apply to the same project scope and currency.
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Project Task Duration Calculator
Estimate total task hours per available worker by multiplying the number of tasks by average hours per task, then dividing by the number of people working in parallel.
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Project Workload Duration Calculator
Estimate the number of weeks needed to complete a task workload from total task hours, team size, and weekly hours each person can contribute. The estimate assumes evenly shared work and steady capacity.
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Resource Utilization Calculator
Estimate a person's or team's resource utilization as the percentage of available work hours assigned to planned project work during a defined period. This simple model excludes leave, non-project duties, and unplanned work unless you subtract them from available hours first.
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Return on Investment Calculator
Estimate simple return on investment as a percentage by comparing an investment's ending value with its starting cost. Enter both amounts in the same currency. The calculation excludes fees, taxes, timing, and reinvested cash flows.
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Sample Size Calculator
Estimate the number of participants needed for a simple estimate of a population proportion using a normal approximation. Set the confidence level as a z-score and provide the desired margin of error and estimated proportion. This planning estimate does not account for finite population size, nonresponse, clustering, or study design effects.
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Script Speaking Time Calculator
Estimate a presentation script's speaking time from its word count and delivery pace, then account for planned pauses.
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Speaking Time Calculator
Estimate how long a prepared speech or presentation will take based on its word count and your speaking pace, with an optional allowance for pauses.
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Sprint Capacity Calculator
Estimate a team's available focused work hours for a sprint from team size, sprint length, time away, and a focus factor. This is a planning estimate, not a forecast of completed work or story points.
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Staff Turnover Rate Calculator
Estimate the percentage of an organization's average workforce that left during a reporting period, using separations and average headcount.
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Staffing Level Calculator
Estimate the full-time-equivalent staffing level needed to cover a weekly workload, based on scheduled hours and the share of each person's time available for that work.
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Four-Value Population Standard Deviation Calculator
Calculate the population standard deviation for exactly four numeric values by measuring their spread around the mean.
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Story Points Calculator
Estimate total story points for a planned set of work by multiplying the number of stories by the average points assigned to each story. This is a planning estimate, not a measure of time or a guaranteed delivery forecast.
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Team Capacity Calculator
Estimate a team's weekly delivery capacity by subtracting planned time away and recurring overhead from available work hours, then applying a focus factor. This is a planning estimate, not a commitment.
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Team Decision Score Average Calculator
Calculate the mean score across reviewers by dividing the total points awarded by the number of reviewers. Use a shared scoring scale and include only completed, comparable reviews.
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Team Decision Weighted Score Calculator
Calculate a weighted score for one option using two criteria. Enter each criterion's weight as a whole-number percentage from 0 to 100 and its option score from 0 to 100 points. The result is the sum of score-times-weight products, reported in weighted points. Weights are applied as entered, without dividing by 100, so the result is a weighted-points total rather than a normalized score. Use this two-criterion model to compare options consistently, entering the same criteria and weights for each option.
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Team Focus Time Capacity Calculator
Estimate the team's daily focus hours by multiplying team size by each person's daily hours available for focus after subtracting daily meeting hours.
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Team Meeting Hours Calculator
Estimate the total person-hours your team spends in recurring meetings each week from the number of attendees, meeting length, and meetings per week.
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Timesheet Hours Calculator
Add daily regular and overtime hours to estimate total hours worked for a reporting period. This calculator sums the hours you enter and does not determine overtime eligibility or pay.
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Training ROI Calculator
Estimate the percentage return on a training program over a selected evaluation period by comparing participant benefits with training costs. This worksheet-style estimate assumes the entered benefit applies to each participant in every period and does not account for discounting, indirect costs, or uncertainty.
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Population Variance Calculator
Calculate the population variance of a set of numeric observations using their count, sum, and sum of squared values. This aggregate-input method assumes the values describe the complete population being analyzed.
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Agile Team Velocity Calculator
Estimate a team's average completed story points per sprint from up to six recent sprints. This planning measure assumes comparable sprint lengths and a consistent estimation scale.
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Weighted Average Calculator
Calculate a weighted average for three values using their corresponding weights. Weights must be greater than zero, and the result is the sum of each value multiplied by its weight divided by the sum of the weights.
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Weighted Decision Matrix Calculator
Compare project or planning options by multiplying each criterion's importance weight by each option's rating, then adding the weighted scores. Use the same criteria and rating scale for every option.
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Working Hours Calculator
Estimate weekly net working hours from the scheduled shift length, unpaid break, and number of workdays. This simple planning model assumes the same shift and break each workday.
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Workload Capacity Calculator
Estimate what share of available work hours is committed to planned tasks. Enter the same period and team scope for both task hours and available hours. The result is a planning ratio, not a performance score.
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