Formulas > =LOGEST()

How To Use LOGEST() Function in Google Sheets


Given partial data about an exponential growth curve, calculates various parameters about the best fit ideal exponential growth curve.

Common questions about the LOGEST formula:
a. What does the LOGEST formula do in Google Sheets?
b. How do I use the LOGEST formula properly?
c. When should I use the LOGEST formula instead of other regression functions?
d. Can the LOGEST formula be used for more than two variables?
e. How does the LOGEST formula differ from the FORECAST or other regression formulas?

Using the LOGEST formula appropriately:

a. Ensure that the data you're analyzing is suitable for an exponential regression model.
b. Use the LOGEST formula to find the exponential scaling factor and exponent when you have x and y data series.
c. Observe correct syntax: =LOGEST(known_data_y, [known_data_x], [stats], [bias])

Common mistyping issues with the LOGEST formula:
a. Forgetting the equal sign before LOGEST, e.g., "LOGEST(A1:A10, B1:B10)" instead of "=LOGEST(A1:A10, B1:B10)"
b. Incorrect syntax, e.g., "=LOGEST(y_data, x_data)", instead of "=LOGEST(known_data_y, [known_data_x], [stats], [bias])"
c. Misspelling "LOGEST" as "LOGSET" or "LONGEST"

Inappropriate use of the LOGEST formula:
 a. Using the LOGEST formula for linear regression rather than exponential regression
 b. Applying the LOGEST formula when the data does not exhibit a logarithmic or exponential trend
 c. Using the LOGEST formula with insufficient or unsuitable data, leading to inaccurate results

Common pitfalls when using the LOGEST formula:
 a. Incorrect data range selection or incomplete data series
 b. Forgetting to specify optional arguments when required ([stats] and [bias])
 c. Not understanding the relationship between a linear and an exponential model, leading to misinterpretation of results

Common mistakes when using the LOGEST formula:
 a. Using incompatible data types or non-numeric data in the formula
 b. Ignoring errors returned by the formula, indicating issues with input data or formula syntax
 c. Assuming the LOGEST formula will always produce accurate results without considering the quality of the input data

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How To Actually Use LOGEST() in Sheets

LOGEST(known_data_y, [known_data_x], [b], [verbose])

Looking for a video tutorial? Members can email me anytime! Check out the blogs below for more info on this formula. Or generate your formula. Find more formulas here at

Learn more about the LOGEST() formula:

LOGEST vs. LINEST in Google Sheets

This video shows the difference between LOGEST and LINEST function in Google Sheets by Phillip John Jarina.

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