Calculators
Planning tools for community learning & nonprofit work, with visible assumptions and units.
Estimate the average cost per attendee by combining venue costs with per-person food and materials costs. Enter your event's expected attendance and costs to see a planning estimate.
Calculate the average number of items circulated per registered borrower during a selected reporting period. Enter circulation transactions and the average number of registered borrowers for the same period.
Estimate the percentage change in community program participation between two periods using the earlier and later participant counts. This simple comparison assumes both counts use the same definition and measurement period.
Estimate the total planned cost of program supplies from your own unit prices and quantities. Enter quantities in units and prices in your currency per unit; the result uses the same currency. This is a planning total and does not include taxes, delivery, or other costs unless you include them in a unit price.
Estimate the digital storage capacity needed for a document archive from the number of pages, average file size, and a user-selected allowance for extra copies and growth. The estimate assumes each page has the same average file size and does not measure your current files.
Estimate the number of paid attendees needed to cover an event's fixed costs after accounting for ticket revenue per person and variable cost per attendee. The result is rounded to two decimal places, so round up to a whole attendee when planning.
Estimate the percentage of event landing-page visitors who complete registration. Enter unique visitors and completed registrations for the same page and reporting period.
Calculate the percentage of scheduled meeting attendances that were completed, using the number of meetings attended and the number of meetings someone was expected to attend.
Estimate how many seats fit in a meeting room by dividing usable floor area by the floor area allocated to each person. This planning estimate does not account for furniture, aisles, accessibility clearances, exits, or local occupancy requirements.
Compare planned and actual project spending to calculate the dollar variance and percentage variance against the original budget. A positive dollar result means spending is over budget, while a negative result means spending is under budget.
Count planned whole sheets for one chosen print item from recipients, copies per recipient, measured sheets per copy and an extra-sheet allowance. It does not infer duplex layout or a printing-press spoilage rate.
Estimate the share of available project hours assigned to each workstream and the hours remaining. Enter the total hours available and the hours planned for each workstream.
Estimate a shared office supply budget from the number of people, monthly cost per person, months covered, and a contingency percentage. The estimate assumes the per-person amount covers the selected period evenly.
Calculate the percentage of people who completed a survey out of the people invited, using counts for completed and invited surveys.
Calculate the percentage of assigned training activities completed by dividing completed activities by total assigned activities and multiplying by 100.
Estimate total volunteer service hours from the number of volunteers, hours contributed per volunteer, and the number of service sessions. This simple model assumes each volunteer contributes the same hours at every session.
Calculate the percentage of volunteers from a starting cohort who remain active at the end of a defined follow-up period.
Estimate total volunteer hours covered by multiplying the number of volunteers by hours per shift and shifts per volunteer.
Estimate a volunteer trip’s reimbursable travel cost by adding distance-based mileage, public transit, lodging, and meal expenses. Enter amounts in one currency and apply your organization’s approved per-mile rate.
Estimate the average cost per attendee by dividing your workshop’s total planned expenses by the expected number of attendees. Enter the expenses you want included and an attendee count greater than zero.