How many dials per hour can an SDR make?

How many dials per hour an SDR can make depends on one number: the average seconds each attempt takes, from dialing through ring time, voicemail and wrap-up. Divide 3,600 by that number, then multiply by the lines dialing at once. Track conversations per hour next to it, because dials only matter when more of them reach a person.

What takes the time in each dial

Every attempt that does not become a conversation spends time in up to 4 steps. Time them for your own reps before you set any target, because each list and each country changes them.

Step	What happens	Who controls it
Find and dial	The rep opens the record, finds the number and dials it	Removed by a power or parallel dialer
Ring	The phone rings until someone answers, voicemail picks up or the dialer hangs up	Partly the rules: in the US, an unanswered telemarketing call must ring for at least 15 s or 4 rings (47 CFR 64.1200(a)(6))
Voicemail or phone menu	The rep hears a greeting, decides to leave a message or hangs up	Shortened when the dialer detects voicemail and phone menus for the rep
Wrap-up	The rep logs the outcome and any note	Shortened by one-click outcomes and notes typed during the call

Conversations take the rest of the hour. A rep on a conversation is not dialing, so the formula only applies to the time between conversations:

Dials per hour ≈ lines × (seconds not on conversations ÷ seconds per attempt) + conversations

Manual, power and parallel dialing compared

The example below shows the math only. The times are assumptions for one hour of calling, not benchmarks: 3 conversations of 4 minutes each including wrap-up (12 minutes), which leaves 48 minutes, or 2,880 seconds, for every other attempt.

Mode	How it works	Example seconds per attempt	Example dials in the hour
Manual	The rep finds, dials and logs each call	15 s find and dial + 25 s ring + 20 s wrap-up = 60 s	2,880 ÷ 60 = 48, plus 3 conversations = 51
Power	The dialer places the next call on 1 line after each wrap-up	25 s ring + 20 s wrap-up = 45 s	2,880 ÷ 45 = 64, plus 3 = 67
Parallel, 2 lines	2 lines ring at once and the first person who answers reaches the rep	45 s per line, 2 lines	About 2 × 64 = 128, plus conversations

Read the parallel row with care. Twice the attempts also means about twice the answered calls, so the rep spends more of the hour on conversations and less time waiting. That is the purpose of parallel dialing: the gain shows up as conversations, not only as dials.

Parallel dialing has a cost that the other modes do not. When 2 people answer at once and only one rep is free, the second call can be abandoned. In the US, a telemarketing call counts as abandoned if it is not connected to a live sales representative within 2 seconds of the person’s completed greeting, and abandoned calls may not exceed 3% of answered calls per campaign over 30 days (47 CFR 64.1200(a)(7)), as of October 2026. For how lines per rep drive that rate, see what a parallel dialer is.

Why conversations per hour is the better metric

Dials per hour measures how fast a rep moves through a list. It says nothing about whether anyone picked up. Two reps who both have 4 conversations in an hour did the same useful work, even if one made 120 dials and the other 50, and the second one used less of the list and fewer calls from each number.

Use 2 numbers together:

• Conversations per calling hour: conversations ÷ hours spent in call sessions.
• Dials per conversation: dials ÷ conversations. It shows how much of the list each conversation costs.

The 2025 edition of The Bridge Group’s SDR research (published 6 Feb 2025, 351 B2B companies) reports that phone-centric SDR teams average 56 dials and 4.6 quality conversations per SDR per day, or about 12 dials per quality conversation. At the manual pace in the example above, 56 dials take a little over an hour. For many teams, the largest gain is not a faster dialer but more protected calling time on the calendar.

To build the full weekly view, with connect rate and conversation-to-meeting rate, see SDR call metrics managers should track every week.

What else limits dials per hour

A faster dialer does not remove these limits. Plan around them.

• Calling hours. In the US, telephone solicitations to residential subscribers are not allowed before 8 a.m. or after 9 p.m. in the called person’s local time (47 CFR 64.1200(c)(1)). Each country sets its own window: see legal calling hours by country.
• Calls per number per day. More dials per hour from the same caller ID number raise the risk that the number gets labeled as spam. See how many calls per day per phone number.
• Abandoned calls. In parallel mode, the 3% US limit and stricter rules elsewhere cap how many lines each rep can run.
• List quality. Wrong and switchboard numbers add ring time and wrap-up without adding conversations.

How to measure your own dials per hour

1. Time 20 attempts per rep across normal call blocks. Note the seconds for each step: dial, ring, voicemail and wrap-up.
2. Work out the average seconds per attempt for calls that did not become conversations.
3. Apply the formula with your own lines per rep and conversation length.
4. Find the longest step. Long wrap-up points to logging work; long ring time points to the hours you call; many voicemails point to the list or the time of day.
5. Track conversations per calling hour every week, per rep and per list, and compare each rep with their own 4-week average.
6. Check calls per number per day whenever dials per hour goes up.

How DialSavvy handles this

Power dialing in DialSavvy places the next call after each wrap-up. Parallel dialing runs 2 lines for a solo rep and 3 for a team of 3 or more; the abandonment governor drops to 2 lines from 2.5% abandoned calls and to 1 line from 2.8%. AI answer detection labels voicemail, phone menus and call screeners. Minimum ring time and calling hours come from each country’s rule pack, and each number makes up to 50 calls a day. Up to 5 lines for teams is coming. See the DialSavvy dialer.

Start this week: time 20 attempts per rep, write down the seconds for each step, and put conversations per calling hour at the top of your next review.