CGLTyping
KDPH Calculator
Convert between Key Depressions Per Hour (KDPH) and words per minute (WPM) — the two units SSC's typing tests use. Enter either value to see the other.
Type in either field — the other updates automatically. Nothing you enter here leaves your browser.
KDPH vs. WPM, Explained
KDPH (Key Depressions Per Hour) is the unit SSC CGL's DEST states its speed requirement in — 2,000 key depressions in 15 minutes is the commonly published standard, which works out to 8,000 KDPH. Other exams, like SSC CHSL and RRB NTPC, instead state their requirement directly as WPM (words per minute).
The conversion between the two uses the standard convention of 5 key depressions per word (roughly the average English word length including a trailing space): WPM = (KDPH ÷ 5) ÷ 60. This calculator does that conversion instantly in either direction, and also shows how many depressions that rate works out to over DEST's 15-minute window and CHSL's 10-minute window.
See the SSC CGL DEST typing test for the full breakdown of how this requirement is scored, or the WPM Calculator to convert your own practice-session numbers.
Why SSC Uses KDPH Instead of WPM
It looks like needless complication until you consider what a data entry post actually involves. A "word" isn't a stable unit — a and administrative are both one word, but one is a single keystroke and the other is fourteen. For a role that's mostly entering names, numbers, codes and addresses, counting words would let two candidates with wildly different actual output post the same score.
Key depressions don't have that problem. Every keystroke counts once: letters, spaces, punctuation, and the Shift you hold for a capital. It measures the physical work of data entry directly, which is exactly what the job is. WPM is the friendlier number to say out loud; KDPH is the one that survives contact with a real dataset.
This is also why "27 WPM sounds easy" is a trap. That figure is derived from 8,000 KDPH by dividing by five — it assumes average-length words. A passage dense with numbers, capitals and punctuation costs more depressions per word than the conversion assumes, so your effective WPM drops even though your fingers are moving at the same speed.
KDPH Reference Table
The figures you're most likely to be quoted, and what each means in practice:
| KDPH | Depressions in 15 min | Depressions in 10 min | ≈ WPM |
|---|---|---|---|
| 6,000 | 1,500 | 1,000 | ~20 |
| 8,000 | 2,000 | 1,333 | ~27 — SSC CGL DEST |
| 9,000 | 2,250 | 1,500 | ~30 |
| 10,500 | 2,625 | 1,750 | ~35 — SSC CHSL English |
| 12,000 | 3,000 | 2,000 | ~40 |
Rounded. Always confirm the exact figure against your exam's current official notification — this shows the arithmetic, not the authority.
Hitting the Number Isn't the Whole Test
A KDPH target is one of two conditions, not the finish line. You also have to stay inside your category's permissible error percentage on the same attempt — clear 8,000 KDPH with too many mistakes and it's still a fail. Work out that side with the typing accuracy calculator, which applies SSC's full-and-half-mistake weighting.
Because both conditions are judged together, a calculator can only ever tell you half the story. A full DEST mock scores speed and errors on one attempt and returns an actual verdict — which is the number worth trusting.
Frequently Asked Questions
Key Depressions Per Hour — the unit SSC CGL's DEST states its requirement in. 8,000 KDPH is the commonly published standard, equal to 2,000 key depressions in 15 minutes.
WPM = (KDPH ÷ 5) ÷ 60, using the standard convention of 5 key depressions per word. This calculator does the conversion instantly in both directions.
SSC's own notification states the DEST requirement in key depressions, since it directly counts every keystroke rather than relying on a word-length assumption. Other exams like SSC CHSL and RRB NTPC instead state a direct WPM target.
