> This page location: Math Functions > FLOOR
> Full Neon documentation index: https://neon.com/docs/llms.txt

# PostgreSQL FLOOR() Function

The PostgreSQL `FLOOR()` function returns a number rounded down to the next whole number.

## Syntax

The syntax of the `FLOOR()` function is as follows:

```sql
FLOOR(numeric_expression)
```

## Arguments

The `FLOOR()` function requires one argument:

**1) `numeric_expression`**

The `numeric_expression` is a number or an expression that evaluates to a number, which you want to round down.

## Return Value

The `FLOOR()` function returns a value whose data type is the same as the input argument.

## Examples

The following example shows how to use the `FLOOR()` function to round a number down to the nearest integer:

```sql
SELECT
    FLOOR( 150.75 );
```

The result is:

```
150
```

See the following `payment` table in the [sample database](../postgresql-getting-started/postgresql-sample-database):

![payment table](https://neon.com/postgresqltutorial/payment-table.png)
The following statement returns the floor of the amount paid by the customer:

```sql
SELECT
    customer_id,
    FLOOR(SUM( amount )) amount_paid
FROM
    payment
GROUP BY
    customer_id
ORDER BY
    amount_paid DESC;
```

The following picture illustrates the result:

![PostgreSQL FLOOR Function Example](https://neon.com/postgresqltutorial/PostgreSQL-FLOOR-Function-Example.png)

## Remarks

To round a number up to the nearest whole number, you use the [`CEIL()`](https://neon.com/postgresql/postgresql-math-functions/postgresql-floor) function.

In this tutorial, you have learned how to use the PostgreSQL `FLOOR()` function to round a number down to the nearest integer, which is less than or equal to the number.

---

## Related docs (Math Functions)

- [ABS](https://neon.com/postgresql/postgresql-math-functions/postgresql-abs)
- [CBRT](https://neon.com/postgresql/postgresql-math-functions/postgresql-cbrt)
- [CEIL](https://neon.com/postgresql/postgresql-math-functions/postgresql-ceil)
- [DEGREES](https://neon.com/postgresql/postgresql-math-functions/postgresql-degrees)
- [DIV](https://neon.com/postgresql/postgresql-math-functions/postgresql-div)
- [EXP](https://neon.com/postgresql/postgresql-math-functions/postgresql-exp)
- [FACTORIAL](https://neon.com/postgresql/postgresql-math-functions/postgresql-factorial)
- [GCD](https://neon.com/postgresql/postgresql-math-functions/postgresql-gcd)
- [LCM](https://neon.com/postgresql/postgresql-math-functions/postgresql-lcm)
- [LN](https://neon.com/postgresql/postgresql-math-functions/postgresql-ln)
- [LOG](https://neon.com/postgresql/postgresql-math-functions/postgresql-log)
- [MOD](https://neon.com/postgresql/postgresql-math-functions/postgresql-mod)
- [MIN_SCALE](https://neon.com/postgresql/postgresql-math-functions/postgresql-min_scale)
- [PI](https://neon.com/postgresql/postgresql-math-functions/postgresql-pi-function)
- [POWER](https://neon.com/postgresql/postgresql-math-functions/postgresql-power)
- [RADIANS](https://neon.com/postgresql/postgresql-math-functions/postgresql-radians)
- [RANDOM](https://neon.com/postgresql/postgresql-math-functions/postgresql-random)
- [ROUND](https://neon.com/postgresql/postgresql-math-functions/postgresql-round)
- [SCALE](https://neon.com/postgresql/postgresql-math-functions/postgresql-scale)
- [SIGN](https://neon.com/postgresql/postgresql-math-functions/postgresql-sign)
- [SQRT](https://neon.com/postgresql/postgresql-math-functions/postgresql-sqrt)
- [TRIM_SCALE](https://neon.com/postgresql/postgresql-math-functions/postgresql-trim_scale)
- [TRUNC](https://neon.com/postgresql/postgresql-math-functions/postgresql-trunc)
- [WIDTH_BUCKET](https://neon.com/postgresql/postgresql-math-functions/postgresql-width_bucket)