Calculate call abandonment rate, abandoned calls, or total calls by entering any two values and solving the missing call center metric.
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Call Abandonment Rate Formula
The main formula for call abandonment rate is:
- AR = abandonment rate as a percentage
- AC = abandoned calls
- TC = total calls
If you know the abandonment rate and total calls, you can calculate abandoned calls:
If you know abandoned calls and abandonment rate, you can calculate total calls:
- Calculating abandonment rate: Use abandoned calls and total calls to find what percentage of calls were abandoned.
- Calculating abandoned calls: Use the abandonment rate and total calls to estimate how many callers abandoned before being handled.
- Calculating total calls: Use abandoned calls and the abandonment rate to estimate the total call volume represented by that rate.
Call Abandonment Rate Benchmarks
Abandonment rate targets vary by industry, queue type, hours of operation, and customer expectations. The table below gives a general way to interpret the result.
| Abandonment Rate | General Interpretation | Common Meaning |
|---|---|---|
| 0% to 2% | Very low | Most callers are reaching an agent or destination before hanging up. |
| 3% to 5% | Often acceptable | Queue performance may be reasonable, depending on service goals. |
| 6% to 10% | Needs attention | Callers may be waiting too long or queue messaging may be ineffective. |
| Above 10% | High | Staffing, routing, callbacks, or queue limits may need review. |
Inputs Used in Call Abandonment Calculations
| Input | What to Count | Common Note |
|---|---|---|
| Abandoned Calls | Calls where the caller hung up before reaching the intended agent, queue outcome, or service point. | Some reports exclude very short abandons, such as calls abandoned within a few seconds. |
| Total Calls | The total number of calls included in the same reporting period and queue. | Use the same time range as abandoned calls. |
| Abandonment Rate | The percentage of total calls that were abandoned. | A higher rate usually indicates longer waits or call handling capacity issues. |
Example Calculations
Example 1: Calculate abandonment rate
You had 85 abandoned calls out of 1,700 total calls.
The call abandonment rate is 5%.
Example 2: Calculate abandoned calls
Your abandonment rate was 4.5%, and you received 2,400 total calls.
The estimated number of abandoned calls is 108.
FAQ
What is a call abandonment rate?
Call abandonment rate is the percentage of inbound calls where the caller hangs up before being handled. It is commonly used in call centers and support teams to measure queue performance and caller wait tolerance.
Should short abandoned calls be included?
It depends on your reporting rules. Some teams exclude calls abandoned within a short threshold, such as 5 or 10 seconds, because those callers may have dialed by mistake or disconnected before meaningfully entering the queue. For consistent results, use the same rule every time you calculate the rate.
Why can abandonment rate increase even if total calls stay the same?
The rate can increase if more callers hang up before being answered. This may happen because wait times are longer, fewer agents are available, routing is inefficient, or callers do not receive helpful queue messages or callback options.
