# ElevatorCalc > Free elevator and escalator calculators: hoistway size, rated load, ADA car size, pit and overhead, traffic analysis, travel time, escalator dimensions, escalator capacity, counterweight balance and rope safety factor. Each one shows its working, cites the code clause and edition, and can be used by AI agents through llms.txt and an MCP endpoint. ElevatorCalc is free and needs no account. Every calculator is a pure function that runs in the visitor's browser; the same functions answer through the MCP endpoint, so a number from the page and a number from the endpoint agree for the same input. Numeric inputs for machines are SI (mm, m, m/s, kg); each output is in the unit declared for it, SI for most, with US companion fields (areaFt2 and clearFloorAreaFt2 in ft², ratedLoadLb in lb) declared as such. Minimum dimensions and loads are rounded up and provided sizes read against a minimum are rounded down; a value you entered is echoed as given. A numeric input is taken to 15 significant digits before it is used (1033.2293579541322 kg is used as 1033.22935795413 kg); every echo of it shows that value, and a computed figure substituted into the working is quoted to 15 significant digits as well. Not engineering advice; a licensed professional checks every result. Not a substitute for a licensed engineer, the manufacturer's data or the authority having jurisdiction; confirm the code edition your jurisdiction has adopted. For calculators 1, 2, 4, 9, 10, 12: First build: the code limits used here await a trade check against a licensed copy of the cited edition. ## Calculators - [Elevator size and hoistway dimensions calculator](https://elevatorcalc.com/calculators/elevator-hoistway-size): Plans the hoistway width, depth and height from the car's inside size, door type and counterweight position. It draws a live plan and section, checks the ASME A17.1 running clearances and gives the car's minimum rated load. MCP tool: `elevator_hoistway_size`. - [Elevator rated load and capacity calculator](https://elevatorcalc.com/calculators/elevator-rated-load-capacity): Minimum rated load from the car's inside platform area, or the largest car area a rated load allows, by the ASME A17.1/CSA B44 passenger formula, with the EN 81-20 person count. MCP tool: `elevator_rated_load`. - [ADA elevator car size checker](https://elevatorcalc.com/calculators/ada-elevator-car-size): Checks an elevator car's inside dimensions and door width against the 2010 ADA Standards: passenger elevators (407.4.1), LULA elevators (408.4.1) and private residence elevators (409.3 and 409.4.1). MCP tool: `ada_elevator_car_size`. - [Elevator pit depth and overhead calculator](https://elevatorcalc.com/calculators/elevator-pit-depth-overhead): Minimum pit depth and overhead for a traction elevator from rated speed, buffer type, runbys and car heights, by ASME A17.1/CSA B44 or EN 81-20. MCP tool: `elevator_pit_overhead`. - [Elevator traffic analysis calculator: how many elevators](https://elevatorcalc.com/calculators/elevator-traffic-analysis): Up-peak round trip time, interval and 5-minute handling capacity for a group of elevators, and the number of cars needed to meet your interval and handling targets, with every step of the working shown. MCP tool: `elevator_traffic_analysis`. - [Elevator speed and travel time calculator](https://elevatorcalc.com/calculators/elevator-speed-travel-time): Flight time between floors for a jerk-limited (S-curve) elevator ride from travel distance, rated speed, acceleration and jerk, with whether rated speed is reached. MCP tool: `elevator_travel_time`. - [Escalator dimensions calculator](https://elevatorcalc.com/calculators/escalator-dimensions): Escalator horizontal run, incline length and overall length from rise, angle and end lengths, with angle, speed and step width checked against ASME A17.1/CSA B44 or EN 115-1. MCP tool: `escalator_dimensions`. - [Escalator capacity calculator: persons per hour](https://elevatorcalc.com/calculators/escalator-capacity): Theoretical escalator capacity in persons per hour from speed and your persons per step planning input, the capacity you plan to use, and how many escalators a demand needs, with the speed checked against ASME A17.1/CSA B44 or EN 115-1. MCP tool: `escalator_capacity`. - [Elevator counterweight and balance calculator](https://elevatorcalc.com/calculators/elevator-counterweight): Counterweight mass from the empty car mass, the rated load and the balance ratio, with the out of balance empty and full and the largest out-of-balance force the machine holds. MCP tool: `elevator_counterweight`. - [Elevator hoist rope safety factor calculator](https://elevatorcalc.com/calculators/elevator-rope-safety-factor): Factor of safety of elevator suspension ropes from rope count, roping, breaking load, car mass, rated load and the rope hanging in the hoistway, checked against EN 81-20 or the ASME A17.1 minimum for your speed. MCP tool: `elevator_rope_safety_factor`. ## For AI agents - [MCP endpoint](https://elevatorcalc.com/api/mcp): stateless Streamable HTTP MCP server. POST one JSON-RPC message per request (initialize, tools/list, tools/call). One tool per calculator; each tool's description carries its units, ranges, clause and edition. The application code does not store or log inputs or results; infrastructure retention is not verified. - [How to connect](https://elevatorcalc.com/mcp): connection snippet for MCP clients. - [Calculator catalogue (JSON)](https://elevatorcalc.com/api/calculators.json): every calculator's inputs with units, ranges and defaults, outputs, formulas and citations. - [Full detail for models](https://elevatorcalc.com/llms-full.txt): every input, output, formula, method and clause in plain text. ## Articles - [Elevator Machine Room Temperature and Heat Load Planning](https://elevatorcalc.com/articles/elevator-machine-room-temperature-heat-load): How to collect the supplier's temperature limits and heat release data for an elevator machine room, add them up transparently, and hand them to the mechanical designer. - [ADA Elevator Door and Signal Timing for Boarding](https://elevatorcalc.com/articles/ada-elevator-door-signal-timing): How the 2010 ADA Standards time the boarding window: T = D / 1.5 ft/s with a 5 second minimum, the separate 3 second door delay, and the exceptions to check first. ## Optional - [Elevator manuals library](https://elevatorcalc.com/manuals): links to free manuals on each publisher's own site, searchable by maker, model and type. - [Terms and disclaimer](https://elevatorcalc.com/terms): how results may be used.