⏱️ Rate of Penetration (ROP) Calculator
Enter the footage drilled and the rotating hours to get the average rate of penetration in ft/hr — the single number crews watch to gauge drilling efficiency.
🧮 Work Out the Drilling Rate
What is a Rate of Penetration Calculator?
It turns an interval of footage and the time it took into an average drilling rate. Divide the feet drilled by the rotating hours and you have ROP in ft/hr — the headline efficiency number for a bit run, a section, or a whole well.
Use it to benchmark bit performance, compare formations, or feed a cost-per-foot analysis. It's a simple average over the interval you enter, so keep intervals consistent when comparing runs.
❓ Frequently Asked Questions
How is rate of penetration calculated?
ROP is the footage drilled divided by the time spent drilling it: ROP (ft/hr) = footage (ft) / hours. Drill 500 feet in 24 rotating hours and your average ROP is about 20.83 ft/hr. It's a simple average over the interval, so the shorter and more uniform the interval, the more representative the figure.
Should I use rotating time or total time?
For a true drilling-efficiency figure, use on-bottom rotating hours — the time the bit was actually making hole. Including connections, tripping, or downtime measures overall progress rather than how fast the bit drills. Be consistent about which you use when comparing runs.
What affects ROP?
Weight on bit, rotary speed, bit type and wear, formation hardness, hydraulics and hole cleaning, and mud properties all influence ROP. Because so many variables interact, ROP is best compared across similar formations and bottom-hole assemblies rather than in absolute terms.
Why does ROP matter?
Rig time is the dominant cost of a well, so faster penetration in the right conditions lowers cost per foot. But chasing maximum ROP can shorten bit life or hurt hole quality, so operators optimize ROP alongside cost per foot and hole condition rather than maximizing it alone.