Calculator library · Account-free
Free Sales Calculators with Visible Formulas
Free browser-local sales calculators with visible formulas, declared units, invalid-state handling, and no lead gate.
- Method owner
- Anastasiia Krynytska
- Reviewed
- 10 Sep 2026
- Reading
- 3 min read
Practical answer
What this resource does
Calculate CAC, simple LTV:CAC, payback, or sales velocity without sending business inputs to Luck My Sales.
- No lead gate. Open, calculate, or download directly.
- Visible method. Definitions, formulas, ownership, and invalid states stay inspectable.
- Human authority. The asset supports a decision; it never owns one.
Customer Acquisition Cost Calculator: CAC, LTV:CAC, and Payback
Enter an aligned cost pool and acquired-customer denominator; optional monthly inputs add simple unit-economics estimates without turning them into a health grade.
Open calculator 02 · Browser-local calculator
Sales Velocity Calculator: Baseline, Scenario, and Sensitivity
The calculator returns the arithmetic throughput rate implied by one declared input set. It is not a forecast, grade, or causal recommendation.
Open calculatorCalculate customer acquisition cost, simple LTV:CAC and payback, or sales velocity without submitting an email or sending business inputs to Luck My Sales. Both calculators run in the browser. Version 1 uses no server storage, cookies, or LocalStorage for entered values, so refreshing or closing the page clears the calculation.
The tools return objective numeric results, substituted formulas, units, assumptions, validation messages, and labeled context. They do not assign subjective “healthy” or “poor” grades. A calculation supports a decision; it does not own one.
01 / Method
Available calculators
Customer Acquisition Cost Calculator
Calculate fully loaded CAC from a reconciled total or visible Sales and Marketing cost components. Add compatible ARPU, gross margin, and churn inputs to estimate simple steady-state LTV, LTV:CAC, and gross-margin-adjusted CAC payback.
Core formula:
CAC = fully loaded Sales and Marketing expense ÷ new customers acquired in the same period.Important boundary: when net churn is zero or negative, the simple
ARPU × gross margin ÷ net churn relationship is invalid. The calculator returns Unavailable and directs the user to cohort contribution LTV; it never displays infinity or a negative lifetime value.Best for: aligned acquisition-cost review, scenario inspection, and a copyable calculation record. It is not an accounting, valuation, or investment model.
Sales Velocity Calculator
Calculate the revenue-throughput rate implied by eligible opportunity count, average deal value, win rate, and average sales-cycle length. Compare a baseline with a scenario and inspect one-variable-at-a-time sensitivity.
Core formula:
opportunities × average deal value × win rate ÷ average sales-cycle length.Important boundary: velocity is not pipeline coverage, weighted pipeline, forecast, quota attainment, or cash collection. The result is meaningful only when all four inputs describe a compatible population and use aligned units.
Best for: exposing driver relationships and testing assumptions. It does not predict that an operational change will cause the modeled result.
02 / Method
What every result includes
- the exact formula and substituted inputs;
- declared currency, period, time unit, and population;
- arithmetic result with display-only rounding;
- missing-input and invalid-denominator behavior;
- alignment, low-sample, or assumption warnings;
- clearly separated owner-supplied context bands where applicable;
- a copyable text summary initiated by the user.
Missing inputs do not become zero. Invalid denominators do not become infinity. Mixed currency or time units block comparison. The interface preserves partial valid results: for example, CAC can remain available even when an invalid churn input makes simple LTV unavailable.
03 / Method
Interpret the number before acting
Check five things: the eligible population, the observation period, the numerator and denominator events, the unit basis, and the source data. Then ask which human owns the decision and what evidence would change it. Scenario deltas are arithmetic, not causal forecasts.
Use Sales KPI formulas for 20 complete metric contracts and the Sales and RevOps glossary for operating definitions. The weekly pipeline review workbook provides the durable record for pipeline actions; the calculator should not become a hidden forecast system.
04 / Method
Privacy and accessibility intent
Calculation logic is browser-local and usable without a lead gate. Controls will use explicit labels, keyboard-operable inputs, accessible error messages, and text equivalents for any visual comparison. No business values are required for page analytics. Users remain responsible for what they copy, export, or share.
Method owner: Anastasiia Krynytska, RevOps Architecture Lead. Resource set reviewed 10 September 2026. Outputs are planning calculations, not guarantees or professional advice.
Method & privacy note
Inspect before you act
- The complete approved editorial text is published on this page, not hidden behind the download or interface.
- Calculator inputs stay in browser memory; workbook contents stay wherever the user saves them.
- Unknown, unavailable, contradicted, and not applicable remain distinct states.
- Corrections: corrections@aiinsales.org.