5G Speed Calculator

Model realistic 5G throughput with advanced radio inputs. Review downlink, uplink, efficiency, and scheduling effects. Turn engineering assumptions into quick, practical speed estimates today.

Calculator Inputs

FR1 suits low and mid band. FR2 suits mmWave.
FDD uses separate paired channels. TDD splits one channel over time.
Enter channel bandwidth allocated to each component carrier.
Carrier aggregation multiplies total usable spectrum.
Used for numerology and slot timing display.
Models guard bands and practical resource packing.
Higher orders need better radio conditions.
Use a lower order when UE transmit quality is limited.
Typical modeling values are below 100 percent.
Use conservative values for noisy or edge conditions.
More layers increase throughput when channel rank supports them.
Uplink layer count is usually lower than downlink.
Includes reference, control, and non-payload resources.
Accounts for control, pilots, and signaling loss.
Converts theoretical peak into a more practical estimate.
Ignored in FDD. Uplink share becomes 100 minus this value.

Example Data Table

Scenario Range Duplex Bandwidth CA SCS DL / UL Layers Estimated Real DL Estimated Real UL
Urban mid-band site FR1 TDD 100 MHz 1 30 kHz 4 / 2 1.366 Gbps 169.00 Mbps
Low-band coverage layer FR1 FDD 20 MHz 1 15 kHz 2 / 1 119.00 Mbps 37.30 Mbps
Dual-carrier mid-band FR1 TDD 100 MHz 2 30 kHz 4 / 2 2.562 Gbps 316.00 Mbps
mmWave hotspot FR2 TDD 400 MHz 1 120 kHz 2 / 1 2.760 Gbps 330.00 Mbps

Formula Used

Peak Downlink Throughput

DL Peak = Bandwidth × Usable Bandwidth Ratio × Bits per Symbol × Coding Rate × Layers × Component Carriers × (1 − DL Overhead) × DL Time Share

Peak Uplink Throughput

UL Peak = Bandwidth × Usable Bandwidth Ratio × Bits per Symbol × Coding Rate × Layers × Component Carriers × (1 − UL Overhead) × UL Time Share

Estimated Real Throughput

Estimated Real Speed = Peak Speed × Scheduler Efficiency

Numerology Display

For SCS values 15, 30, 60, and 120 kHz, numerology is μ = 0, 1, 2, and 3. Slot Duration = 1 / 2μ ms.

This is an engineering estimator. Live user speed can be lower because of signal quality, mobility, retransmissions, scheduler policy, load, and device limits.

How to Use This Calculator

  1. Select the frequency range and duplex mode for the deployment you want to model.
  2. Enter bandwidth per carrier and the number of aggregated carriers.
  3. Choose subcarrier spacing to match the planned numerology.
  4. Set usable bandwidth ratio to reflect guard bands and actual payload capacity.
  5. Pick downlink and uplink modulation orders that fit expected radio quality.
  6. Enter coding rates and MIMO layers for both directions.
  7. Add overhead percentages and scheduler efficiency for a more realistic estimate.
  8. If using TDD, set downlink share. Uplink share is automatically derived.
  9. Press the calculate button to show the results above the form, then export them as CSV or PDF.

FAQs

1. What does this calculator estimate?

It estimates theoretical peak and more practical 5G downlink and uplink throughput from bandwidth, modulation, coding, layers, carrier aggregation, overhead, and duplex time sharing.

2. Why are real field speeds usually lower?

Live networks face fading, interference, device limits, scheduler contention, control signaling, retransmissions, handovers, and transport limits. Those factors reduce user throughput versus ideal payload capacity.

3. Does higher subcarrier spacing always increase speed?

Not automatically. Higher spacing mainly changes numerology and slot timing. With fixed usable bandwidth, payload rate depends more on modulation, coding, layers, overhead, and time allocation.

4. Why are downlink and uplink modeled separately?

Downlink and uplink often use different modulation orders, coding rates, layer counts, overhead, and time shares. Separate inputs produce a more realistic estimate for each direction.

5. How should I choose coding rate values?

Use higher values for strong radio conditions and lower values for edge coverage or conservative planning. Many planners test several cases to create optimistic, nominal, and stressed scenarios.

6. What does usable bandwidth ratio mean?

It represents the share of channel bandwidth that effectively carries payload after guard bands and practical resource packing effects are considered in a simplified planning model.

7. Does carrier aggregation multiply speed linearly?

It can increase total capacity strongly, but real gains depend on device support, band combinations, scheduling, radio quality, and whether all carriers are equally usable at the same time.

8. Is this suitable for formal acceptance testing?

It is best for planning, comparison, and quick engineering estimates. Formal acceptance or SLA validation should rely on drive tests, counters, logs, and controlled field measurements.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.