Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Budget Variance Calculator

Calculate budget variance as a percentage by comparing actual spending against planned budget. Use it for project cost control, financial reporting, and identifying overrun risk early enough to take corrective action.

Planned Budget ($)

Actual Spent ($)

Fill in the required fields to see your result.

Project Management

Critical Path Duration Calculator

Sum the durations of three sequential tasks to estimate critical-path duration. Use it for very simple linear project sizing or as an introduction to the critical-path concept — for real projects with branching dependencies, use proper CPM software.

Task 1 Duration (days)

Task 2 Duration (days)

Task 3 Duration (days)

Fill in the required fields to see your result.

Key differences

	Budget Variance Calculator	Critical Path Duration Calculator
Category	Project Management	Project Management
Inputs required	2	3
Result	Budget Variance (%)	Critical Path Duration (days)
What it does	Calculate budget variance as a percentage by comparing actual spending against planned budget. Use it for project cost control, financial reporting, and identifying overrun risk early enough to take corrective action.	Sum the durations of three sequential tasks to estimate critical-path duration. Use it for very simple linear project sizing or as an introduction to the critical-path concept — for real projects with branching dependencies, use proper CPM software.