Open it on your phone. Get what you need. Get back to work.
Field is the practical side of TW Response Systems — calculators and quick references built for the moments you don't have time to dig through a manual.
Pump discharge pressure calculator
Pick your hose size, length, and flow, and get PDP instantly — including friction loss, elevation, and appliance loss.
Positive for gain, negative for drop.
- Nozzle pressure
- 80 psi
- Friction loss
- 69.8 psi
- Elevation
- +0.0 psi
- Appliance loss
- 0 psi
Uses the standard fireground formula PDP = NP + FL + appliance loss ± elevation, where FL = C × (GPM/100)² × (length/100). Provided for training and reference only — always follow your department's pump charts, SOPs, and on-scene judgment.
Fire, EMS, and general tools built for on-scene use.
Everything below is what Field is being built toward. Anything not marked available is still planned.
Fire
Pump math and hose-line references for engine and truck crews.
- Pump discharge pressure calculatorAvailable now
Friction loss, elevation, and appliance loss worked out from your hose lay — live on the Field page below.
- Friction-loss calculatorPlanned
- Pump card builderPlanned
- Hose-lay calculationsPlanned
- Elevation calculationsPlanned
- Appliance calculationsPlanned
- Quick-reference guidesPlanned
EMS
Clinical references built for the back of a moving ambulance.
- EMS calculatorsPlanned
- Clinical referencesPlanned
- ECG / 12-lead referencesPlanned
- Pediatric referencesPlanned
- Medication referencesPlanned
General
Cross-discipline tools for gear, checklists, and protocols.
- Gear inspectionPlanned
- Equipment checklistsPlanned
- Quick referencesPlanned
- Protocol lookupPlanned
- Additional field toolsPlanned
Have a field tool your crew actually needs?
Field is being built around what responders ask for. Tell us what would save you time on scene.