Numbers and Time in Indonesian

Overview

Indonesian numbers follow a very logical system that is easy to learn. The numbers 1-10 are unique words, and everything beyond that follows predictable patterns. Unlike many Asian languages, Indonesian does not use classifiers or counters for most counting situations, though you will encounter them occasionally.

Telling time in Indonesian is also straightforward. The word jam means both "hour" and "o'clock," and the system follows a 12-hour format with time-of-day markers (pagi, siang, sore, malam) instead of AM and PM. Currency is expressed in rupiah, Indonesia's monetary unit.

How It Works

Numbers 0-10

Number	Indonesian
0	nol
1	satu
2	dua
3	tiga
4	empat
5	lima
6	enam
7	tujuh
8	delapan
9	sembilan
10	sepuluh

Numbers 11-100

Pattern	Example	Indonesian
11-19: X + belas	11	sebelas
	12	dua belas
	15	lima belas
Tens: X + puluh	20	dua puluh
	30	tiga puluh
	50	lima puluh
Combined	25	dua puluh lima
	99	sembilan puluh sembilan
100		seratus

Telling Time

Indonesian	English
Jam berapa sekarang?	What time is it now?
Jam tiga.	3 o'clock.
Jam tiga sore.	3 PM.
Jam delapan pagi.	8 AM.
Jam setengah empat.	3:30 (half to four).

Time of Day

Indonesian	Approximate Time	English
pagi	6:00-11:00	morning
siang	11:00-15:00	midday
sore	15:00-18:00	afternoon
malam	18:00-6:00	night

Examples in Context

Indonesian	English	Note
satu dua tiga empat lima	1, 2, 3, 4, 5	Basic counting
Jam berapa sekarang?	What time is it now?	Asking the time
jam tiga sore	3 PM	Afternoon marker
Berapa harganya?	How much?	Asking a price
Saya punya dua anak.	I have two children.	Number + noun
Harganya lima puluh ribu rupiah.	It costs 50,000 rupiah.	Price
Jam setengah tujuh pagi.	6:30 AM.	Half-hour notation
Nomor telepon saya...	My phone number is...	Digits read one by one
Dia berumur dua puluh lima tahun.	She is 25 years old.	Age
Lantai tiga.	Third floor.	Ordinal use

Common Mistakes

Misunderstanding setengah (half) in time

• Wrong: Thinking jam setengah tiga means 3:30
• Right: Jam setengah tiga means 2:30 (half to three)
• Why: Indonesian "half" refers to half-way to the next hour, like Dutch or German. Setengah tiga = half to three = 2:30.

Forgetting se- for "one"

• Wrong: satu puluh for 10
• Right: sepuluh (se- replaces satu in compounds)
• Why: In compounds, "one" becomes the prefix se-: sepuluh (10), seratus (100), seribu (1,000).

Using AM/PM instead of Indonesian time markers

• Wrong: Jam 3 PM
• Right: Jam tiga sore
• Why: Indonesian uses pagi/siang/sore/malam instead of the AM/PM system.

Practice Tips

1. Count objects around you in Indonesian every day. Start with 1-10, then expand to higher numbers. Practice saying prices when you see them.
2. Practice telling the time throughout the day using Indonesian time-of-day markers: Sekarang jam... pagi/siang/sore/malam.

Related Concepts

• Basic Time Words — essential time vocabulary beyond clock time
• Days, Months, and Dates — calendar vocabulary
• Quantity Expressions — words for expressing amounts