5G NR Throughput Calculator
Use this 5G NR Throughput Calculator to quickly estimate peak DL and UL data rates for different 5G NR configurations. It supports key parameters like bandwidth, SCS, PRBs, modulation, MIMO layers, code rate, overhead, and TDD ratio, making it useful for protocol testing, RAN planning, interview preparation, and 5G learning.
TechLTEWorld 5G Tool
5G NR Throughput Calculator
Estimate peak 5G NR downlink and uplink throughput using bandwidth, subcarrier spacing, modulation, MIMO layers, scaling factor, overhead and TDD DL/UL ratio.
100 MHzCommon n78 C-band throughput scenario.
30 kHzTypical FR1 mid-band subcarrier spacing.
256QAMHigh-order modulation for peak data rate.
4 LayersMIMO layer count directly increases throughput.
5G NR Peak Throughput Estimator
Select the NR carrier configuration. The calculator uses a practical peak-throughput approximation based on PRBs, symbols, modulation order, MIMO layers, code rate, overhead and TDD ratio.
Peak DL Throughput
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Peak UL Throughput
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PRBs / Subcarriers
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12 subcarriers per PRB
Slots Per Second
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Based on numerology μ
Throughput Formula
Practical peak approximation
Throughput ≈ PRB × 12 × Symbols/slot × Slots/sec × Modulation bits × Layers × Code rate × Scaling × (1 − Overhead) × DL/UL ratio
This is a useful engineering estimator. Real throughput can be lower due to scheduler, BLER, MCS variation, DMRS/PDCCH overhead, TDD pattern, UE category, RF condition, and network load.
Common 5G NR Throughput Examples
| Scenario | Typical Input | What it shows |
|---|---|---|
| n78 C-Band Peak DL | 100 MHz, 30 kHz SCS, 256QAM, 4 layers | Common mid-band 5G NR peak throughput estimation. |
| FDD Low/Mid Band | 20 MHz, 15 kHz SCS, 64QAM/256QAM, 2 layers | Useful for LTE-refarmed NR bands and FDD deployment. |
| mmWave | 400 MHz, 120 kHz SCS, 256QAM, 4/8 layers | Very high throughput but RF coverage is more challenging. |
BandwidthHigher bandwidth gives more PRBs and more available resource elements for data.
SCS / NumerologyHigher SCS gives shorter slots and more slots per second, but PRB count depends on channel bandwidth and SCS.
ModulationQPSK = 2 bits, 16QAM = 4 bits, 64QAM = 6 bits, 256QAM = 8 bits per symbol.
MIMO LayersThroughput scales almost linearly with layers when RF condition and UE/network support it.
OverheadOverhead accounts for control, DMRS, CSI-RS, guard and other non-data resources.
TDD RatioIn TDD, DL and UL share time resources, so DL/UL ratio strongly impacts peak throughput.
5G NR Throughput Interview Q&A
| Question | Short Answer |
|---|---|
| Why does 100 MHz NR give high throughput? | Because wider bandwidth provides more PRBs and more resource elements for PDSCH/PUSCH data. |
| How does 256QAM improve throughput? | 256QAM carries 8 bits per modulation symbol, increasing bits per resource element. |
| Why does MIMO layer count matter? | Each layer can carry an independent data stream, so 4 layers can significantly increase throughput compared to 1 layer. |
| Why is real throughput lower than peak? | Due to RF condition, MCS, BLER, scheduling, overhead, TDD pattern, UE capability and network load. |
| Why is TDD ratio important? | In TDD, DL and UL use different time slots, so the configured DL/UL pattern directly limits peak DL/UL throughput. |
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