What the Family History Interview Cost Calculator does
The Family History Interview Cost Calculator estimates the direct labor and travel cost of recording oral histories. It uses four inputs: the number of interviews, minutes per interview, an hourly rate, and total travel cost. Its result, Interview cost (currency), combines paid interview time with the travel amount you enter.
This estimate can help families, local history groups, archives, and independent oral history projects plan a basic recording budget. It focuses on interviewer time and travel. The calculation does not assign a price to the memories shared, and it does not estimate equipment, transcription, editing, storage, permissions, or archival processing.
The model assumes each interview takes the same number of minutes and that the hourly rate applies to all interview time. Travel cost is entered once as a total for the project. If interviews differ in length or require different rates, use a representative average or calculate separate groups and add the subtotals.
How to use the Family History Interview Cost Calculator
Enter values that describe the project you want to estimate. Use whole interviews for the count. Enter the average interview duration in minutes, the rate in currency per hour, and the combined travel cost in currency. Keep the same currency throughout the calculation. The calculator does not convert currencies.
- Count the planned interviews. Include each session you expect to record. If one relative will be interviewed more than once, count each session.
- Estimate minutes per interview. Use the anticipated recording duration, not the number of hours in a day or the number of people in the family.
- Enter the hourly rate. Use the rate that applies to the interviewer’s time. If the work is unpaid, enter zero to show no labor charge in this model.
- Add travel cost. Enter the total project travel amount once. For remote interviews with no travel expense, use zero.
For example, suppose a family plans 3 interviews, each lasting 60 minutes. The interviewer’s rate is 40 currency units per hour, and total travel cost is 20 currency units. The calculation is 3 × 60 ÷ 60 × 40 + 20, which equals 140 currency units. The time portion is 120 currency units, and the travel portion is 20.
How the Family History Interview Cost Calculator formula works
The formula is interview_count × minutes_per_interview ÷ 60 × hourly_rate + travel_cost. Dividing minutes by 60 converts the combined interview duration into hours so it can be multiplied by a currency-per-hour rate. Travel cost is then added as a separate amount.
For instance, 3 interviews of 60 minutes each represent 180 minutes, or 3 hours. At 40 currency units per hour, the interview labor total is 120 currency units. Adding 20 currency units in total travel cost gives 140 currency units. The units remain consistent because hours multiplied by currency per hour produce currency, and the travel input is already in currency.
Zero is valid for any input. A zero hourly rate produces no labor charge, while a zero travel amount adds nothing. The calculation has no division by a user-entered value, so a zero value will not create a divide-by-zero result. The limits allow up to 10,000 interviews, 100,000 minutes per interview, and 1,000,000 currency units for either rate or travel input. Use realistic project figures even when your values fall well within these broad limits.
Use cases for the Family History Interview Cost Calculator
A simple estimate can make early planning easier when a family or community group is deciding how many interviews to record and whether to hire help. You can compare scenarios by changing one input at a time, such as recording a shorter session or conducting several interviews in one trip.
- Family projects: estimate paid interviewer time and travel for conversations with relatives across several households.
- Community history work: create a preliminary labor and travel figure for a set of oral history sessions.
- Archive planning: compare the direct interview costs of different proposed session counts before preparing a fuller budget.
- Scenario review: examine how the estimate changes when the average session length, hourly rate, or travel total changes.
For projects with different interview lengths, group sessions with similar durations. Calculate each group with its own count and average minutes, then add the labor and travel subtotals. Avoid adding the same travel expense to multiple groups. This keeps the total aligned with the formula’s assumption that travel is entered once per project or group.
Other factors to consider when calculating interview costs
The estimate covers only the inputs supplied. Interview projects may also involve preparation, scheduling, consent discussions, equipment, transcription, audio cleanup, file backup, cataloging, and long-term preservation. Those tasks can require separate time or service costs. Decide which tasks belong in the project budget, then record them separately so the interview estimate stays understandable.
Duration can also be uncertain. A conversation may run longer than planned, or a follow-up session may be needed to clarify a name, place, date, or family relationship. Consider calculating a few plausible scenarios rather than treating one estimate as a guaranteed final cost. If a rate already includes preparation or post-interview work, avoid counting that same work again elsewhere in a broader budget.
Travel should reflect the scope you choose. The calculator accepts one total travel cost and does not calculate mileage, fares, lodging, or per-person expenses from trip details. Use a total supported by your own project information. For remote recording, there may be no travel amount, though connectivity or equipment expenses would need separate treatment.
For archival use, discuss recording formats, file naming, consent, access restrictions, and preservation responsibilities with the people managing the collection. These are important project decisions, but they are not determined by this arithmetic estimate. The calculator offers a transparent starting point for direct interview labor and travel only.
FAQ
Does the result include transcription?
No. The result includes interview labor as calculated from the hourly rate and interview time, plus the travel total entered. Transcription, editing, cataloging, and preservation costs are outside the formula unless you have deliberately included them in an input amount.
What should I enter if relatives volunteer their time?
Enter zero for the hourly rate if you want the estimate to show no labor charge. You can still include any travel cost. If you want to record the value of volunteer hours for internal planning, enter an appropriate rate, while labeling the result as an estimated value rather than cash paid.
Can I estimate interviews with different lengths?
Yes. Use a reasonable average duration for a quick estimate, or calculate separate groups for short and long sessions. Add the group totals and ensure travel is counted only once where costs are shared.
How should I handle several trips?
Add the expected trip expenses together and enter that sum as total travel cost. The calculator does not infer trip count or distance, so the amount must come from your own travel plan.
Is the result a quote or final budget?
No. It is a basic estimate based on four supplied values. Actual project spending may differ because of preparation, extra sessions, service fees, equipment, transcription, or other work not represented in the formula.