One wrong number on the rig costs time, money, and sometimes lives. Get five precision drilling fluid calculators in one offline-capable app — always in your pocket, no signal needed.
One-time purchase. No subscription. Works offline. Instant access.
No fumbling with spreadsheets or paper charts. Enter your numbers, get your answer instantly. ECD, kill weight, hydrostatic pressure — all in one place.
Rigs don't always have internet. Mud Calc installs as a PWA and runs 100% offline — on your phone or tablet, no connection required.
Large inputs, clean readouts, light and dark mode. Designed to be readable in harsh lighting, gloves-off, under pressure. No fluff, no clutter.
From Oil Rigs Now — trusted by oilfield professionals since 2011.
We build practical tools for the people who work in the field, not the office. No subscriptions. No data collection. Just the calculations you need to do your job safely and efficiently.
No refunds. All sales are final. Instant access on purchase.