How to round up to the nearest 100 in JavaScript

To round up and down to the nearest 100 use Math.round:

Math.round(number/100)*100

round vs. ceil:

Math.round(60/100)*100 = 100 vs. Math.ceil(60/100)*100 = 100

Math.round(40/100)*100 = 0 vs. Math.ceil(40/100)*100 = 100

Math.round(-60/100)*100 = -100 vs. Math.ceil(-60/100)*100 = -0

Math.round(-40/100)*100 = -0 vs. Math.ceil(-40/100)*100 = -0

No part of this requires jQuery. Just use JavaScript's Math.ceil:

Math.ceil(x / 100) * 100

Use Math.ceil(), if you want to always round up:

Math.ceil(number/100)*100