How big the file will be before you export
Width, height and format, and you get the file size to expect, the pixel count, and whether it fits an email.
Choosing a format for the job
JPEG at high quality is the sharing format: small, universal, good enough for a client to open on a phone. WebP is smaller still and fine on the web, less so in print shops and older software.
PNG keeps transparency and every pixel, at many times the size, so it suits cut outs and diagrams more than photographs. TIFF is the print shop's format, uncompressed and large.
Sizes here are typical for photographic content. A render with large flat areas compresses smaller, a noisy one larger. When the file will not fit an email, a board link in Rendair shares the full resolution with no attachment at all.
Other free tools
- Scale ConverterConvert lengths between a scaled drawing and real size at 1:50, 1:100, 1:200 and more, in metric or imperial. Free, no sign up.
- Unit ConverterConvert length, area and volume between metric and imperial units: meters, feet, square meters, square feet, cubic meters, cubic yards and more.
- Stair and Ramp CalculatorWork out risers, riser height, tread depth and total run for a stair, or the length and landings for an accessible ramp, from the total rise.
- Project Cost EstimatorEstimate a construction budget from floor area, building type and level of finish, with design fees and contingency on top. Free, for early conversations.
- Project Timeline EstimatorEstimate a building project timeline phase by phase, from brief and concept to construction and handover, by floor area and complexity.
- Material Quantity EstimatorEstimate concrete volume, brick and block counts, paint litres and tile counts from dimensions, with a waste allowance. Free, no sign up.
- Roof Pitch CalculatorWork out a roof pitch in degrees, as a ratio and as a gradient from rise and run, with the rafter length. Free, no sign up.
- Floor Area Ratio CalculatorCalculate the allowed floor area, footprint and stories from site area, floor area ratio and site coverage. Free, for early feasibility.
- Window to Wall Ratio CalculatorCalculate the window to wall ratio of a facade and check daylight with a glazing to floor area rule of thumb. Free, no sign up.
- Parking CalculatorCalculate parking spaces and parking area for housing, offices, retail and hotels at common ratios, with accessible spaces. Free, no sign up.
- Occupancy CalculatorCalculate occupant load from floor area and use, with the number of exits and total exit width it needs. Free, for a first check of a plan.
- Sun Angle CalculatorCalculate sun altitude and azimuth for a latitude, date and hour, with shadow length, for shading studies and renders with correct light.
- Print Size CheckerCheck whether an image has enough pixels to print at a given size: resolution in dpi, a quality reading, and the largest print at 300 dpi.
- Aspect Ratio PlannerPlan a crop to a target aspect ratio from an image size: the exact pixel dimensions that fit and the pixels lost on each side. Free, no sign up.
The numbers are done. Now the image.
Turn the sketch, plan or model into a render the client can react to.