Free Tools
Simple Load Estimator (Load Estimate)
Estimate dead + live load on a slab/space for a general picture (educational). No safe/unsafe verdict — that's an engineer's domain.
Advanced — load values▾
Live load per SNI 1727 & dead load estimate; adjust as needed.
Load estimate — not a structural-capacity verdict
This is an early estimate based on common rules of thumb, NOT a structural calculation. The truly safe sizes/values depend on load, soil conditions, and seismic risk at your site, and MUST be calculated by a certified structural engineer (also a PBG permit requirement). Do not build structural elements based on this calculator alone.
Load estimate (not capacity)
This is a LOAD estimate, not structural capacity. The calculator does not state whether a structure can carry this load.
Need proper load & structural analysis?
Leave your contact and a Luxury Art engineer will help with load analysis & structural design for a PBG permit. Free initial consultation.
Understanding building loads
Dead vs live load
Dead load is the weight of fixed elements (concrete slab, screed, tiles, ceiling), while live load is variable (people, furniture, goods) per the space function under SNI 1727.
Live load follows function
The space function sets the live load: residential is relatively light (~1.92 kN/m²), while retail and warehouses are far heavier. The calculator uses SNI reference values you can adjust.
Load estimate ≠ structural capacity
Knowing the load is only half the story. Whether a structure CAN carry it is determined by capacity analysis by an engineer — and this calculator deliberately gives NO safe/unsafe conclusion.
FAQ
Frequently asked questions
What are dead load and live load?
Dead load is the weight of all fixed building parts — concrete slab, screed, floor finish, ceiling, and so on. Live load is variable: people, furniture, and goods. Total load = dead load + live load.
What's the residential live load per SNI?
SNI 1727 gives minimum live loads per function. Residential is generally about 1.92 kN/m², office about 2.4 kN/m², retail about 4.79 kN/m². This calculator uses these as editable defaults.
Does this calculator determine if my structure is safe?
No, and this is important. The calculator only estimates the load MAGNITUDE on an area. Whether a slab, beam, or column CAN carry it is a structural-capacity analysis that MUST be done by a certified engineer. Don't use this figure to decide structural sizes.
What is kN and how does it convert to kg?
kN (kilonewton) is a unit of force. 1 kN equals about 101.97 kgf (at Earth's gravity). The calculator shows results in kN and an equivalent in kg to make it easier to picture, but both express the same load.
Why still need an engineer if I know the load?
Because knowing the load is only the first step. Engineers compute how the load transfers, the moments and forces on each element, seismic effects, then determine safe dimensions and reinforcement — and sign off the calculation required for a PBG permit. The Luxury Art team provides this service.
Structure & Early Estimates
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All free, no signup, and every calculation runs on your own device.
Luxury Art — Structural & Architecture Design
You have the early estimate. The structural calc needs an expert.
The calculator here is only an early estimate — decisions on structural size & strength must be calculated by a certified engineer, and are also a PBG permit requirement. Luxury Art provides certified structural & architecture design, professional cost planning, and design-build & construction management.
Architecture Design
Floor plans, elevations, and working drawings as the basis for structural calculation.
Certified Structural Design
Structural calculation by a certified engineer, ready for PBG permit submission.
Professional BoQ (RAB)
A detailed, realistic budget plan to keep your project's cost under control.
Design-Build & Construction Management
Construction and supervision by an experienced team, on time and to specification.
The initial consultation is free with no obligation. We help map out your design, structure, and permit needs.