Project Management Calculators

Budget Burn Rate Calculator

Calculate a project's weekly budget burn rate and how many weeks of budget runway remain at the current spending pace.

Change Order Cost Impact Calculator

Calculate the new total budget and percentage increase resulting from a project change order, including schedule impact.

Cost Performance Index Calculator

Calculate the Cost Performance Index (CPI) in Earned Value Management to measure cost efficiency against actual spending.

Critical Path Calculator

Compare multiple task-duration paths through a project and identify the critical path, the longest chain that sets the minimum possible project finish date.

Earned Value Calculator

Calculate SPI, CPI, schedule variance, and cost variance from earned value, planned value, and actual cost using standard earned value management formulas.

Gantt Chart Duration Calculator

Convert a project start date and sequential task durations into exact start and end dates for every task, ready to plot directly on a Gantt chart.

Milestone Slippage Calculator

Calculate how many days a project milestone has slipped from its original planned date, an early warning indicator for schedule problems.

Project Budget Variance Calculator

Calculate budget variance in dollars and as a percentage from actual cost versus planned budget, with an over, under, or on-budget status label included.

Project Buffer Size Calculator

Calculate a project buffer size using the Critical Chain Project Management method, pooling individual task safety margins.

Project Cost Estimate Calculator

Estimate total project cost from labor hours, hourly rate, and fixed costs, with a clear breakdown of labor cost versus fixed expenses for proposals.

Project Timeline Calculator

Sum sequential task durations in days or weeks and, with a start date, get a projected project finish date for accurate schedule commitments and client quotes.

Release Date Forecast Calculator

Forecast a project release date based on remaining story points, average team velocity, and sprint length.

Resource Allocation Calculator

Calculate resource utilization percentage from hours used versus hours available, with under-utilized, fully utilized, and over-allocated status bands included.

Risk Exposure Calculator

Calculate expected risk exposure in dollar terms based on probability of occurrence and potential impact cost.

Schedule Performance Index Calculator

Calculate the Schedule Performance Index (SPI) in Earned Value Management to measure schedule efficiency as a ratio.

Schedule Variance Calculator

Calculate Schedule Variance (SV) in Earned Value Management, comparing earned value against planned value to determine schedule health.

Sprint Velocity Calculator

Calculate average sprint velocity from recent story point totals and forecast how many sprints are needed to clear a remaining product backlog completely.

Task Completion Percentage Calculator

Calculate the percentage of tasks completed out of a total task count for quick, accurate project status updates and stakeholder status reporting.

Team Capacity Calculator

Calculate effective team capacity in hours from team size, weekly hours per person, project duration in weeks, and a real-world availability percentage.

Team Utilization Rate Calculator

Calculate a team member's or team's utilization rate as a percentage of billable or productive hours against total available hours.

Every Project Has One Path That Sets the Deadline

Not every task on a project timeline is equally urgent — some have slack, and one specific sequence of dependent tasks actually determines the earliest the whole project can finish. These ten calculators cover scheduling and tracking math for projects.

Finding the Critical Path, Step by Step

List every task with its duration and dependencies. Note which tasks cannot start until another specific task finishes.
Map out every possible path through the task network from project start to project finish, following the dependency chains.
Add up the duration of each complete path. Some paths will be much shorter than others, since they may run in parallel with longer chains.
The longest path is the critical path. It sets the minimum possible project duration — delaying any task on this specific path delays the entire project, while delays on shorter paths often do not, as long as they stay within their available slack.

Run this directly with the Critical Path Calculator, or track progress against the plan with the Earned Value Calculator.

Popular Project Management Calculators

Sprint Velocity Calculator — calculates a team's average completed work per sprint for future planning.
Project Budget Variance Calculator — compares actual spend against planned budget at a point in time.
Team Capacity Calculator — estimates available team work hours for a given period.