Lab management calculators

Know your numbers.
Run a better lab.

Free calculators for lab managers and owners. No login required.

Don't have exact figures? An estimate will suffice. These calculators are built for quick, confident decisions, not audits. Estimate freely and refine later if your situation demands it.

Inventory Tracker
Select Calculator
Free
Labor Cost per Test
A quick way to estimate labor cost per test from hourly wage and hands-on minutes. Rough numbers will suffice. Result feeds into True Cost of Test.
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Please fill in all fields with values greater than zero.

Enter your hourly wage and hands-on time, then tap Calculate to see your labor cost per test.

Labor Cost per Test
Populated into True Cost of Test automatically.
Labor Cost / Sample
Samples per FTE
Formula
Labor Cost / Test = (Hourly Wage ÷ 60) × Minutes per Test
Labor Cost / Sample = Labor Cost / Test (same metric)
Samples / FTE = Monthly Volume ÷ Number of Staff
Free
True Cost of Test
Estimate the fully loaded cost of running a test and see what's left after reimbursement. Approximate figures for reagent and overhead will suffice. Labor cost can pull in from the Labor Cost calculator.
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Please fill in reagent cost, labor cost, and reimbursement.

Fill in reagent, labor, and reimbursement, then tap Calculate to see your true cost and margin.

Profit per Test
True Cost
Gross Margin
Formula
True Cost = Reagent Cost + Labor Cost + Overhead
Profit / Test = Reimbursement − True Cost
Gross Margin % = (Profit / Test ÷ Reimbursement) × 100
Free
Equipment Payback Period
A rough estimate of how many months until new equipment pays for itself. Good for a first gut check before a formal capital request. Cost per test can pull in from True Cost of Test.
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Please fill in all fields with values greater than zero.

Enter equipment cost and volume, then tap Calculate to see your payback period.

Payback Period
Monthly Profit
Profit per Test
What if volume changes? 0%
Formula
Profit / Test = Reimbursement − Cost / Test
Monthly Profit = Profit / Test × Monthly Volume
Payback Period (months) = Equipment Cost ÷ Monthly Profit
Free
Vendor Cost Comparison
Stack two vendor quotes side by side, including instrument cost and annual maintenance, to see which one wins at your volume. Estimated pricing will suffice for a first pass.
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Please enter monthly volume and reagent cost for both vendors.

Enter both vendors' pricing, then tap Compare Vendors to see which one wins.

5-Year Savings with Best Vendor
Vendor A Annual
Vendor B Annual
Vendor A 5-Year
Vendor B 5-Year
What if volume changes? 0%
Formula
Annual Reagent Cost = Cost / Test × Monthly Volume × 12
Total Annual Cost = Annual Reagent Cost + Annual Maintenance
5-Year Total = (Total Annual Cost × 5) + Instrument Cost
Savings = |Vendor A 5-Year − Vendor B 5-Year|
Free
Instrument Depreciation
Spread an instrument's cost over its useful life using straight-line depreciation, then see what that adds to your cost per test. Approximate useful life and salvage value will suffice.
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Please fill in all fields with values greater than zero.

Enter purchase price and useful life, then tap Calculate to see annual depreciation.

Annual Depreciation
Monthly
Per Test
What if volume changes? 0%
Formula (Straight-Line)
Annual Depreciation = (Purchase Price − Salvage Value) ÷ Useful Life (yrs)
Monthly Depreciation = Annual Depreciation ÷ 12
Depreciation / Test = Monthly Depreciation ÷ Monthly Test Volume
Free
Send-Out vs. Bring In-House
Compare what you're paying a reference lab against an estimated in-house setup, and see what volume would make bringing it in-house worthwhile. Rough cost inputs are enough to get a directional answer.
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Please fill in send-out cost, volume, reimbursement, instrument cost, and in-house variable cost.

Fill in your send-out and in-house costs, then tap Analyze to see your savings.

Monthly Savings at Current Volume
Current Monthly Cost
In-House Monthly Cost
Break-Even Volume
Equipment Payback
Formula
Monthly Send-Out Cost = Send-Out Cost / Test × Monthly Volume
Monthly In-House Cost = (Variable Cost / Test × Volume) + (Annual Maintenance ÷ 12)
Monthly Savings = Send-Out Cost − In-House Cost
Break-Even Volume = (Annual Maintenance ÷ 12) ÷ (Send-Out − Variable Cost / Test)
Equipment Payback = Instrument Cost ÷ Monthly Savings