/ /Purchase Frequency Calculator
Purchase Frequency Calculator
How often do customers buy? Orders per customer over any period, annualized rate, and average days between purchases for replenishment timing.
Frequency Inputs
Total Orders
Unique Customers
Period (months)
Purchase Frequency
Purchase Frequency2.50 orders / customer
Annualized Rate2.50 / year
Days Between Purchases146 days
Frequency verdict: Customers buy 2.50x per period (~every 146 days annualized). Time replenishment reminders just before that interval and subscriptions slightly inside it.
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Authoritative References
Frequently Asked Questions
How is purchase frequency calculated?
Total Orders / Unique Customers over the period. With 15,000 orders from 6,000 customers in 12 months, frequency is 2.5x per year.
What is a good purchase frequency?
Consumables target 3-6x yearly; fashion 2-4x; considered goods 1-2x. Rising frequency at flat acquisition means retention compounds.
How do I annualize frequency?
Multiply period frequency by 12 / Period Months. A 1.25 frequency over 6 months annualizes to 2.5x per year for fair comparisons.
How does frequency set reminder timing?
Trigger replenishment at 80-90% of the average days-between interval. For 146-day cycles, remind at day 120 — before the customer shops elsewhere.
Frequency vs repeat rate?
Frequency measures depth (how many orders); repeat rate measures breadth (how many customers return). Grow breadth first, then depth with subscriptions.