diff --git a/app/assets/javascripts/job.js b/app/assets/javascripts/job.js
index 198a7823381..573c4deb3e4 100644
--- a/app/assets/javascripts/job.js
+++ b/app/assets/javascripts/job.js
@@ -1,7 +1,7 @@
 import _ from 'underscore';
 import { visitUrl } from './lib/utils/url_utility';
 import bp from './breakpoints';
-import { bytesToKiB } from './lib/utils/number_utils';
+import { numberToHumanSize } from './lib/utils/number_utils';
 import { setCiStatusFavicon } from './lib/utils/common_utils';
 import { timeFor } from './lib/utils/datetime_utility';
 
@@ -193,7 +193,7 @@ export default class Job {
         // we need to show a message warning the user about that.
         if (this.logBytes < log.total) {
           // size is in bytes, we need to calculate KiB
-          const size = bytesToKiB(this.logBytes);
+          const size = numberToHumanSize(this.logBytes);
           $('.js-truncated-info-size').html(`${size}`);
           this.$truncatedInfo.removeClass('hidden');
         } else {
diff --git a/app/views/projects/jobs/show.html.haml b/app/views/projects/jobs/show.html.haml
index 1d0aaa47b60..fd24bbbb9ba 100644
--- a/app/views/projects/jobs/show.html.haml
+++ b/app/views/projects/jobs/show.html.haml
@@ -60,7 +60,7 @@
         .js-truncated-info.truncated-info.hidden-xs.pull-left.hidden<
           Showing last
           %span.js-truncated-info-size.truncated-info-size><
-          KiB of log -
+          of log -
           %a.js-raw-link.raw-link{ href: raw_project_job_path(@project, @build) }>< Complete Raw
 
         .controllers.pull-right
diff --git a/changelogs/unreleased/sh-make-kib-human.yml b/changelogs/unreleased/sh-make-kib-human.yml
new file mode 100644
index 00000000000..c40bb34fa4a
--- /dev/null
+++ b/changelogs/unreleased/sh-make-kib-human.yml
@@ -0,0 +1,5 @@
+---
+title: Humanize the units of "Showing last X KiB of log" in job trace
+merge_request:
+author:
+type: fixed
diff --git a/spec/javascripts/job_spec.js b/spec/javascripts/job_spec.js
index 4f06237deb5..b740c9ed893 100644
--- a/spec/javascripts/job_spec.js
+++ b/spec/javascripts/job_spec.js
@@ -1,4 +1,4 @@
-import { bytesToKiB } from '~/lib/utils/number_utils';
+import { numberToHumanSize } from '~/lib/utils/number_utils';
 import * as urlUtils from '~/lib/utils/url_utility';
 import '~/lib/utils/datetime_utility';
 import Job from '~/job';
@@ -169,7 +169,7 @@ describe('Job', () => {
 
           expect(
             document.querySelector('.js-truncated-info-size').textContent.trim(),
-          ).toEqual(`${bytesToKiB(size)}`);
+          ).toEqual(`${numberToHumanSize(size)}`);
         });
 
         it('shows incremented size', () => {
@@ -195,7 +195,7 @@ describe('Job', () => {
 
           expect(
             document.querySelector('.js-truncated-info-size').textContent.trim(),
-          ).toEqual(`${bytesToKiB(50)}`);
+          ).toEqual(`${numberToHumanSize(50)}`);
 
           jasmine.clock().tick(4001);
 
@@ -209,7 +209,7 @@ describe('Job', () => {
 
           expect(
             document.querySelector('.js-truncated-info-size').textContent.trim(),
-          ).toEqual(`${bytesToKiB(60)}`);
+          ).toEqual(`${numberToHumanSize(60)}`);
         });
 
         it('renders the raw link', () => {