01
Economic Production Quantity Calculator method
Demand and production are treated as constant, with no shortages and fixed setup cost. Enter annual demand and the operating-day count so both daily rates use one shared time basis.
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Economic Production Quantity Calculator
Calculate a production lot size when replenishment happens gradually. Enter annual demand, working days, daily production rate, setup cost and annual holding cost to inspect the EPQ assumptions and cost balance.
FREE TO USEA LOOK ATLAS TOOL
01 USE IT NOW02 NO ACCOUNT03 FIELD NOTES BELOW
WORKING INPUTS
Use one declared scenario.
LIVE RESULT
Economic production quantity
2,400.00 unitsContinuous-model production lot size. Test feasible whole-number lots separately.DAILY DEMAND200.00 units/day
MAXIMUM INVENTORY1,800.00 units
ANNUAL SETUP COST$900.00
ANNUAL HOLDING COST$900.00
ANNUAL RELEVANT COST$1,800.00
PRODUCTION RUN / CYCLE3.00 / 12.00 days
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PRODUCTION AND DEMAND RUN TOGETHER
Model the stock that builds while you make it
Unlike a one-time delivery, a production run fills stock gradually while demand draws it down. The production-rate assumption is what makes EPQ different from an EOQ purchase batch.
WORKING VIEW
2,400.00 UNITS48,000/YEAR · 800/DAY · $45 SETUP · $1 HOLDING
METHOD√[2 × annual demand × setup cost ÷ (holding cost × (1 − demand rate / production rate))]
WORKING NOTEDaily demand is 200 over 240 days. EPQ is 2,400; annual setup and holding each cost $900.
INPUTS → CLEAR OUTPUT
THE FIELD NOTES
Quick answer above. Better decisions below.
Use the result now, then read the practical notes for assumptions, examples, limitations, and the choices behind it.
48,000/YEAR · 800/DAY · $45 SETUP · $1 HOLDING2,400.00 UNITS
Daily demand is 200 over 240 days. EPQ is 2,400; annual setup and holding each cost $900.
02
Keep the inputs consistent
Daily production must exceed daily demand. The result is a continuous-model lot size, shown to two decimals, rather than an executable order recommendation. Evaluate feasible integer lot sizes and operational constraints separately.
03
Use the result in your workflow
Keep the useful output beside the source values so another person can check the same scenario.
04
Know the limits of this tool
The annual cost balance includes setup and holding only. It excludes unit manufacturing cost, capacity variation, minimum lots, changing lead times, stock-outs and quantity discounts. Re-estimate inputs when those assumptions change.
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Economic Production Quantity Calculator method
Demand and production are treated as constant, with no shortages and fixed setup cost. Enter annual demand and the operating-day count so both daily rates use one shared time basis.
Keep the inputs consistent
Daily production must exceed daily demand. The result is a continuous-model lot size, shown to two decimals, rather than an executable order recommendation. Evaluate feasible integer lot sizes and operational constraints separately.
Use the result in your workflow
Keep the useful output beside the source values so another person can check the same scenario.
Use the economic order quantity calculator when replenishment arrives as a purchased lot rather than gradual production. Estimate annual holding inputs with the inventory holding cost calculator before relying on a modeled production lot size.
Know the limits of this tool
The annual cost balance includes setup and holding only. It excludes unit manufacturing cost, capacity variation, minimum lots, changing lead times, stock-outs and quantity discounts. Re-estimate inputs when those assumptions change.
Questions, answered.
How does the economic production quantity calculator work?
Demand and production are treated as constant, with no shortages and fixed setup cost. Enter annual demand and the operating-day count so both daily rates use one shared time basis.
What should I check before using the result?
Daily production must exceed daily demand. The result is a continuous-model lot size, shown to two decimals, rather than an executable order recommendation. Evaluate feasible integer lot sizes and operational constraints separately.
What does this tool leave out?
The annual cost balance includes setup and holding only. It excludes unit manufacturing cost, capacity variation, minimum lots, changing lead times, stock-outs and quantity discounts. Re-estimate inputs when those assumptions change.
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