ProdCalc is a free online MRP built to replace spreadsheets used as MRP.
The problem
Using spreadsheets as MRP is manual work disguised as a system.
Materials in one sheet. BOM in another. Inventory somewhere else. You connect everything yourself — multiplying quantities, checking stock, trying to keep it all consistent.
Every change breaks something.
A quantity changes. A BOM is updated. Inventory moves.
Now you have to go back and recalculate everything — and hope nothing was missed.
Most of the time, it “works”.
Until it doesn’t.
And when it fails, it fails late — when production is already affected.
The solution
MRP is not just data. It’s relationships.
Materials depend on BOM. BOM depends on output. Inventory affects everything.
Spreadsheets don’t handle that structure — you do.
ProdCalc does.
You define materials, BOM and inventory once. The system connects everything and calculates requirements automatically.
No manual recalculation. No cross-checking.
Just a clear answer: what’s missing.
What stays in spreadsheets
Spreadsheets are very useful.
Use them for:
- aggregate planning
- MPS
- economic batch calculations
- lead times
- capacity planning
But not for MRP.
That’s where structure matters.
Why is ProdCalc free?
The goal is simple: make a proper MRP accessible without cost.
The platform will be supported through supplier visibility and premium services — not by charging for basic use.
How to use
Getting started is straightforward.
Just go to the ProdCalc AI Chat and start your MRP:
- Create a RAW material
- Create an ASSEMBLED material
- Create an Output Forecast for the ASSEMBLED material
- Check the material shortages, that is, the dates with not enough material for production or shipment to the customer.
From there, you see what’s required and what’s missing.
If you’re currently using spreadsheets as MRP, you already know the effort it takes.
ProdCalc replaces that part.
If you want to see it with your own data or an example, send a message on LinkedIn and we’ll help you set it up.
