In Excel: use =EXP(number) — it raises the constant e (about 2.71828) to your exponent, so =EXP(1) returns 2.718281828.
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Syntax
Arguments
| Argument | required / optional | Description |
|---|---|---|
number | required | The exponent to raise e (about 2.71828) to. |
Related functions
Select the result cell and type =EXP(.
Enter the exponent — often a rate multiplied by a number of periods.
Press Enter.
To reverse the operation, apply LN to the result; the two undo each other exactly.
What this does
EXP raises Euler's number e to a power. It is the exact inverse of LN, so =EXP(LN(A2)) returns A2, and that pairing is what makes it useful outside pure maths: continuous growth and decay models, logistic curves and interest compounded continuously are all expressed with EXP. In practice most spreadsheet users meet it when converting a log-scale coefficient back into a real-world multiplier, or when a growth model is specified in continuous rather than periodic terms. Keep the inputs visible and clearly labelled and the whole thing stays auditable — anyone who opens the file later, including you, can see at a glance exactly what feeds the result and change one assumption without hunting through the formula. Treat “exponential function in excel” as a small repeatable workflow rather than a one-off click you hope to remember next time. Use a small test block before the live file, so any surprise in the affected formula shows up while it is still harmless. When a formula is involved, keep the inputs labelled beside it, reference cells instead of typing values, and apply number formatting only after the result checks out. That turns a calculation you can defend to a CFO or an auditor into a method you can reuse, explain, and defend when the workbook leaves your screen.
A worked example
Continuous compounding of 10,000 at 5 % for 3 years: =10000*EXP(0.05*3) returns about 11,618. Converting a log-model coefficient of 0.182 back into a multiplier, =EXP(0.182) returns roughly 1.20 — a 20 % uplift. Exponential decay of 500 units at 12 % per period over 4 periods: =500*EXP(-0.12*4). EXP is how a continuous-growth model gets expressed in a spreadsheet, and how log-scale results get translated back into figures a reader can act on. Check the referenced cells, argument order and result type in your workbook. Start with the worked example before changing an input, then compare the changed result with the calculation you expected. An error value or a result of a different type is a reason to inspect the inputs and arguments.
In Google Sheets
Google Sheets support for this task has not been verified. Check the function, arguments and workflow in the target product before transferring the example. Matching formula notation does not establish identical behaviour. The aim was to get you unstuck fast and leave you a little more capable than a copy-paste would. The answer is at the top and the detail above shows why it holds — so the next time a colleague asks, you can answer without reaching for search. For “exponential function in excel”, keep the input cells and the result visible while you check the formula in Excel. Follow the worked example and change one input at a time. The steps explain the workbook calculation; this page does not run a live calculator for that task.
Common mistakes
- Using EXP where ordinary periodic compounding was meant; that is
=principal*(1+rate)^periods, not continuous compounding. - Passing a large exponent, which overflows to
#NUM!— EXP grows extremely fast. - Confusing EXP with the ^ operator; ^ takes any base, EXP is fixed to e.
Frequently asked questions
What is e in Excel?
=EXP(1) returns it: approximately 2.718281828. There is no separate E() constant the way there is PI().
How do I reverse EXP?
Apply LN. =LN(EXP(5)) returns 5 exactly, because the two are inverses.
When would I use EXP rather than ^?
When the model is specified in continuous terms — continuous compounding, exponential decay, or converting a log-scale coefficient back to a multiplier.
Other ways people ask this
On the way here you may have searched this as “exponential function excel formula” and “exponential functions in excel” — it is all the same task, and this page is the single, complete answer to it.
Why do people search for this in so many different ways?
Because the same task has many names. “exponential function excel formula”, “exponential functions in excel” all point at the one operation explained on this page, which is why they all lead here.