CommunicationAvailable
UART Baud Rate Calculator
Calculate UART bit time, frame bits, character time, transmission time, payload data rate, and baud-rate comparisons.
Calculator category
Communication Calculators
Engineering calculators for UART, I2C, SPI, CAN, RS-485, and other electronic communication interfaces.
Available Calculators
12
Engineering Applications
9
Calculators
Each listed tool links to a working calculator with engineering inputs, formulas, examples, notes, and related resources.
CommunicationAvailable
UART Timing Calculator
Calculate UART bit time, frame time, packet transmission time, sampling instant, baud-rate error, and timing comparisons.
CommunicationAvailable
I²C Pull-up Resistor Calculator
Calculate I²C pull-up resistor limits, rise time, bus capacitance, sink current, and RC time constant.
CommunicationAvailable
SPI Clock Calculator
Calculate SPI clock divider settings, bit time, byte transfer time, block transfer time, throughput, and CPOL / CPHA modes.
CommunicationAvailable
CAN Bus Bit Timing & Baud Rate Calculator
Calculate Classical CAN bit timing, baud rate, time quantum, prescaler, TSEG values, sample point, SJW, and timing candidates.
CommunicationAvailable
RS-232 Cable Length Calculator
Estimate RS-232 cable length from capacitance budget, cable capacitance, non-cable load, UART timing, and propagation delay.
CommunicationAvailable
RS-485 Termination Calculator
Calculate RS-485 termination resistor match, effective bus load, termination current, resistor power, split termination, and reflection estimates.
CommunicationAvailable
Ethernet PoE Power Calculator
Calculate IEEE PoE power budget, PD available power, cable loss, current, voltage, efficiency, and multi-port switch power.
CommunicationAvailable
USB Power Budget Calculator
Calculate USB power, current, voltage drop, cable power loss, available power, efficiency, and multi-device USB power budget.
CommunicationAvailable
Data Rate Converter
Convert data rates between bps, kbps, Mbps, Gbps, Tbps, B/s, MB/s, GB/s, and IEC byte-rate units.
CommunicationAvailable
Network Throughput Calculator
Calculate effective network throughput, protocol efficiency, bandwidth utilization, overhead loss, transfer time, and data transfer capacity.
CommunicationAvailable
Communication Latency Calculator
Calculate theoretical communication latency, transmission delay, propagation delay, processing delay, queuing delay, total latency, and round trip time.
How to Use These Calculators
Start From the Engineering Question
Choose the calculator that matches the decision you need to make: decode a component marking, size a value, check a frequency response, estimate loss, or verify a safety margin. A category page is useful only when it helps you reach a working tool, so this page lists released calculators only.
Check Units and Assumptions
Calculator results depend on unit choices, idealized formulas, tolerance, temperature, frequency range, and component limitations. Review the formula and engineering notes on each calculator page before using the result in a schematic, BOM, or PCB layout.
Validate Against Real Parts
Use the calculated value as a design reference, then confirm it against datasheets, derating curves, layout parasitics, measurement conditions, and manufacturer limits. The related guides below provide background when a calculation needs more context.
Engineering Applications
UART timing
I2C and SPI interfaces
CAN networks
RS-485 links
Data rate conversion
Network throughput
Transfer speed estimation
Communication latency
Round trip time estimation
Related Engineering Guides
Engineering Guide
Measuring Network Goodput and Latency: Payload, Clocks, and Tail Delay
Measure unique delivered payload and response delay with defined intervals, synchronized clocks, loss, and tail-latency reporting.
10 min · Intermediate
Engineering Guide
RS-232 Cable Design: Capacitance, Edge Timing, Grounding, and Validation
Screen RS-232 cable capacitance and length, then verify loaded receiver swing, UART timing, ground reference, and installed-link errors.
17 min · Intermediate
Engineering Guide
I²C Bus Design: Pull-Up Window, Capacitance, Clock Stretching, and Validation
Design an I²C bus with feasible pull-up values, full installed capacitance, translated logic levels, clock stretching, and measured timing.
18 min · Intermediate
Engineering Guide
SPI Timing Budget: Clock, Data, Chip Select, and Board-Level Verification
Close SPI MOSI, MISO, and chip-select timing using clock edges, setup and hold, return flight time, transaction overhead, and board measurement.
18 min · Intermediate
Engineering Guide
RS-485 Bus Design: Termination, Fail-Safe Bias, Stubs, and Validation
Design and verify an RS-485 trunk with end termination, idle bias, short stubs, common-mode margin, and installed-cable testing.
18 min · Intermediate
Engineering Guide
UART and CAN Timing: Clock Error, Sampling, Bit Segments, and Propagation
Design UART and CAN timing with endpoint clock error, sampling margin, CAN time quanta, bit segments, SJW, and physical propagation-delay budgets.
20 min · Intermediate
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