Convert Mbps to Gbps

Content last reviewed:2026-09-30

One thousand megabits per second make one gigabit per second, so you divide a speed in Mbps by 1,000. Enter the speed your test measured or the one in your plan, and the result appears right away: 940 Mbps gives 0.94 Gbps. The Swap order button takes you to the reverse conversion.

Megabits/s

Mbps

Gigabits/s

Gbps

What is a megabit per second, and what is a gigabit per second?

A megabit per second, written Mbps, is the unit in which internet plans state connection speed and speed tests report their result. It stands for one million bits sent in one second. A bit is the smallest piece of information, a single zero or one.

A gigabit per second, or Gbps, is a thousand megabits per second, which makes a billion bits every second. In the International System of Units, the prefix mega means one million and the prefix giga one billion[1].

The forms Mb/s and Gb/s or Mbit/s and Gbit/s name the same units. A megabyte per second has a different symbol, MB/s with an uppercase B, and is eight times larger than a megabit per second.

How many Gbps is 1000 Mbps?

One thousand megabits per second is exactly 1 Gbps. To convert Mbps to Gbps, divide the number of megabits by 1,000: Gbps = Mbps ÷ 1,000.

Without a calculator, move the decimal point three places to the left. Below 100 Mbps a zero appears after the point, so 50 Mbps is 0.05 Gbps. Above a thousand megabits the result is larger than one, and 10,000 Mbps gives exactly 10 Gbps.

The conversion helps when you compare speeds written in different units, for example a 600 Mbps plan and a 1 Gbps plan. Once both are in gigabits, you can see the second one is 0.4 Gbps faster. The Gbps to Mbps converter turns gigabits back into megabits.

Is 1024 Mbps the same as 1 Gbps?

A speed of 1,024 Mbps is 1.024 Gbps. Mega and giga are SI prefixes, and the SI Brochure from the BIPM says plainly that they “should not be used to indicate powers of 2”[1]. That is why you divide a connection speed by 1,000.

NIST, the US National Institute of Standards and Technology, explains where 1,024 came from in networking. Some designers of local area networks used a megabit per second to mean 1,048,576 bits per second, while in telecommunications the unit means one million bits per second[2]. The binary values have their own units: the mebibit per second (Mibit/s) and the gibibit per second (Gibit/s)[2].

You will come across the factor 1,024 with file sizes, where the prefixes are sometimes counted in binary. That is why the MB to GB converter lets you choose between two ways of counting, while this converter always divides by 1,000.

Mbps to Gbps conversion table

The rows cover speeds from 50 to 100,000 Mbps. They include speed test results, Wi-Fi link rates and port speeds, and each result has as many decimal places as the converter's field shows.

Speed in Mbps	Same speed in Gbps
50 Mbps	0.05 Gbps
80 Mbps	0.08 Gbps
90 Mbps	0.09 Gbps
100 Mbps	0.1 Gbps
150 Mbps	0.15 Gbps
200 Mbps	0.2 Gbps
250 Mbps	0.25 Gbps
300 Mbps	0.3 Gbps
400 Mbps	0.4 Gbps
480 Mbps	0.48 Gbps
500 Mbps	0.5 Gbps
600 Mbps	0.6 Gbps
700 Mbps	0.7 Gbps
750 Mbps	0.75 Gbps
800 Mbps	0.8 Gbps
866 Mbps	0.866 Gbps
900 Mbps	0.9 Gbps
940 Mbps	0.94 Gbps
1,000 Mbps	1 Gbps
1,200 Mbps	1.2 Gbps
1,201 Mbps	1.201 Gbps
1,300 Mbps	1.3 Gbps
1,500 Mbps	1.5 Gbps
2,000 Mbps	2 Gbps
2,400 Mbps	2.4 Gbps
2,402 Mbps	2.402 Gbps
2,500 Mbps	2.5 Gbps
3,000 Mbps	3 Gbps
3,500 Mbps	3.5 Gbps
4,000 Mbps	4 Gbps
4,804 Mbps	4.804 Gbps
5,000 Mbps	5 Gbps
5,400 Mbps	5.4 Gbps
6,000 Mbps	6 Gbps
7,000 Mbps	7 Gbps
8,000 Mbps	8 Gbps
10,000 Mbps	10 Gbps
20,000 Mbps	20 Gbps
30,000 Mbps	30 Gbps
40,000 Mbps	40 Gbps
100,000 Mbps	100 Gbps

The Pi Hut lists its USB 3.2 to Gigabit Ethernet converter with the network standards “10/100/1000Mbps”[3]. The fastest of them, 1,000 Mbps, is 1 Gbps.

How many Gbps do GPON and XGS-PON fiber lines carry?

Recommendations from the International Telecommunication Union give the line rate of GPON and XGS-PON fiber networks separately for each direction. Both columns describe the same value.

Yellow fiber optic cables plugged into green module sockets in a telecom rack, next to blue connectors marked RX and TX — Yellow fiber optic cables run into green module sockets, and the blue connectors are marked RX and TX, for receive and transmit. Line rates are given for each direction separately, which is why the table has separate rows toward the subscriber and from the subscriber. Photo: Kirill Sh, Unsplash.

Fiber line	In Mbps	Same speed in Gbps
GPON, toward the subscriber	2,400 Mbps	2.4 Gbps
GPON, from the subscriber	1,200 Mbps	1.2 Gbps
XG-PON1, from the subscriber	2,500 Mbps	2.5 Gbps
XGS-PON, nominal rate in both directions	10,000 Mbps	10 Gbps
XGS-PON, actual line rate	9,953.28 Mbps	9.95328 Gbps

Recommendation ITU-T G.984.1 gives two combinations of line rates for GPON networks. According to the recommendation, the combination of 1.2 Gbps from the subscriber and 2.4 Gbps toward the subscriber covers nearly all deployed and planned systems[4]. Recommendation ITU-T G.9807.1 defines XGS-PON as a nominal 10 Gbps in both directions and its actual line rate as 9.95328 Gbps. The older XG-PON1 has 10 Gbps toward the subscriber and 2.5 Gbps from the subscriber in the same recommendation[5].

How many Gbps is your plan, and how many does a speed test show?

With a 1 Gbps plan you meet several numbers at once: the speed in the plan, the data rate left after each layer of headers and the link rate of your Wi-Fi. The table puts them in both units.

Back of a home router with four yellow Ethernet sockets numbered 4 to 1, next to ADSL, USB and Internet sockets — The four yellow Ethernet sockets on the back of this router connect it to a computer by cable. A speed test run over a cable in such a socket is the result to compare with your plan. A given router's product page lists how fast its sockets are. Photo: Stephen Phillips, Unsplash.

Where the number comes from	In Mbps	Same speed in Gbps
A 1 Gbps plan and a Gigabit Ethernet port	1,000 Mbps	1 Gbps
Data in an Ethernet frame after its header and the gap between frames	975.29 Mbps	0.97529 Gbps
File data after the IP and TCP headers as well	949.28 Mbps	0.94928 Gbps
File data when TCP uses timestamps	941.48 Mbps	0.94148 Gbps
Wi-Fi 5, top link rate with two spatial streams on an 80 MHz channel	866.7 Mbps	0.8667 Gbps

The three middle rows are a calculation for a 1 Gbps connection. An Ethernet frame takes up 1,538 bytes on the wire, and the data fits into 1,500 of them[6]. Of that data, 20 bytes go to the IP header[7] and 20 bytes to the TCP header, which grows to 32 bytes with timestamps[8]. In that last case, 1,448 bytes of every 1,538 are left for file data, or 94.15% of the port speed. The Wi-Fi 5 row comes from the rate table of the 802.11ac standard, where 866.7 Mbps is the top rate for two spatial streams on an 80 MHz channel[9].

TP-Link TL-SG1005P, a black five-port unit with a yellow and a red cable plugged in, next to a white TP-Link access point — The label on this TP-Link model, “5-Port Gigabit Desktop Switch with 4-Port PoE+”, tells you it has five Gigabit Ethernet ports. A computer cabled to one of them connects at up to 1,000 Mbps, which is 1 Gbps. Photo: User_Pascal, Unsplash.

Which megabit speed notations does this converter accept?

The field accepts and converts each of these notations, so you can paste a speed test result or your plan's speed exactly as you have it: with a decimal point, a comma or thousands separators, with its unit and with the label copied from a speed test. The table shows what the converter does with each entry, and the converter calculated the results itself.

What you type	What the converter shows	How we read it
940	0.94 Gbps	A number on its own is a speed in megabits per second, so we divide it by 1,000 and drop the trailing zero.
940 Mbps	0.94 Gbps	A unit pasted together with the number does no harm: we take the number and skip the unit.
Download: 941.2 Mbps	0.941 Gbps	A speed test result copied with its label: we take the number before the unit and show the result to three decimal places.
1,000	1 Gbps	A comma before three digits separates thousands, as in English notation. A note under the field shows the other possible reading, 1.
12,500	12.5 Gbps	Groups of three digits separated by commas are read as one number: twelve thousand five hundred megabits. A note under the field shows the other possible reading, 12.5.
2,500 Mbps	2.5 Gbps	The comma separates thousands, so the field keeps 2500 Mbps. A note under the field shows the other possible reading, 2.5.
2.500 Mbit/s	0.0025 Gbps	On this English page, a dot before three digits is a decimal point, so the field keeps 2.5 Mbps. A note under the field shows the other possible reading, 2500. Type two and a half thousand as 2500.
100 mb/s	0.1 Gbps	A symbol written in lowercase is counted in this field as megabits per second, because that is the field's unit.
1201 Mbps	1.201 Gbps	A Wi-Fi link rate copied with its unit is in the same megabits, so the result keeps every decimal place.
2.5 Gbps	2.5 Gbps	Gigabits pasted into the megabit field are stored as 2500 Mbps, and a note under the field says what happened to the pasted value.
118 MB/s	0.944 Gbps	An uppercase B stands for bytes, and a byte has eight bits, so the field stores this download speed as 944 Mbps.
1 Gbit	1 Gbps	A unit without “/s” is read as gigabits per second and stored in the field as 1000 Mbps.
1 gbps to mbps	1 Gbps	A query copied from a search engine: the unit without a number is the one you convert to, so the field keeps 1000 Mbps.
12.34	0.0123 Gbps	A result below 0.1 Gbps is shown to three significant digits, so a small speed never turns into zero.

The MB/s to Mbps converter turns a speed read in MB/s from a download window into megabits. The kbps to Mbps converter handles a speed given in kilobits.

How do you check whether a speed test matches your plan?

Your plan gives one number and a speed test gives another. The steps take you through comparing both in the same unit.

Convert the speed in your plan
Type the number from your plan into the field. A speed of 1,000 Mbps gives 1 Gbps, and 600 Mbps gives 0.6 Gbps. This is the value you compare with the test.
Test over a cable and enter the result
Run a speed test on a computer connected by cable and type the number it shows into the same field. A result of 940 Mbps gives 0.94 Gbps, so both numbers are now in one unit.
Subtract what the headers take
Headers take up part of every Ethernet frame, so a test on a 1 Gbps port shows at most 949 Mbps, or 941 Mbps when the connection uses TCP timestamps. A result around 940 Mbps is therefore close to the most such a connection can show.
Check how the computer is connected
Over Wi-Fi, the link rate is the upper limit: Wi-Fi 5 with two spatial streams on an 80 MHz channel connects at up to 866.7 Mbps[9], and a test over that link comes out lower. Compare your plan with the result of a wired test.

Convert other units to Gigabits/s

Tbps to Gbps

Convert Megabits/s to other units

Mbps to MB/s Mbps to kbps

Sources

The International System of Units (SI), 9th edition — Bureau International des Poids et Mesures
Prefixes for binary multiples — National Institute of Standards and Technology
USB 3.2 to Gigabit Ethernet Converter — The Pi Hut
Recommendation ITU-T G.984.1, Gigabit-capable passive optical networks (GPON) — International Telecommunication Union
Recommendation ITU-T G.9807.1, 10-Gigabit-capable symmetric passive optical network (XGS-PON) — International Telecommunication Union
Ethernet frame — Wikipedia
RFC 791: Internet Protocol — Internet Engineering Task Force
RFC 7323: TCP Extensions for High Performance — Internet Engineering Task Force
IEEE 802.11ac — Wikipedia

Every figure in the tables was computed from the unit definitions and checked arithmetically before publication. Historical values and the names of local units come from the sources listed above.

Content last reviewed: September 30, 2026 · written and checked by the Arteon team

Frequently asked questions about Mbps and Gbps

What if my plan gives two speeds, download and upload?

Convert each one separately, because the divisor is the same for both directions. A plan with 1,000 Mbps down and 300 Mbps up gives 1 Gbps and 0.3 Gbps. A symmetric fiber plan has both numbers equal, while on a GPON network the upstream is narrower at the level of the line itself[4].

How do you convert megabits per second to kilobits per second?

One megabit per second is 1,000 kilobits per second, so this time you multiply by a thousand. A speed of 100 Mbps gives 100,000 kbps, and the Mbps to kbps converter does the conversion.

Arteon free tool screenshot: Convert Mbps to Gbps

Have a question or a suggestion?

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