Calculadora de cabios gratis: luz + pendiente (altura/recorrido o grados) dan la longitud real por Pitágoras, con alero, ángulo de pendiente y cantidad de pares según la separación. Nota del asiento incluida.
Free rafter calculator: span + pitch (rise/run or degrees) gives true rafter length by Pythagoras, with overhang, pitch angle and rafter-pair count from spacing. Birdsmouth note included.
Free render and plaster mortar calculator: wall area × layer thickness × published consumption rate (1.5 kg per m² per mm) = dry mortar kilos and 25/40 kg bags.
Free brick wall calculator: wall size + brick size + mortar joint gives the brick count with waste, wet and dry mortar volume and 25 kg ready-mix bags. Metric and US modular presets.
Calculadora de volumen de hormigón gratis: losas, zapatas y columnas a m³ y yardas cúbicas, con el conteo de sacos de premezcla de 80, 60 y 40 lb según rendimientos publicados y margen de desperdicio.
Free concrete volume calculator: slab, footing or column dimensions to m³ and cubic yards, plus pre-mix bag counts (80/60/40 lb) at published yields, with a waste allowance toggle.
Free drywall calculator: wall dimensions in, sheet count for 4×8 or 4×12 boards out — plus screws, ready-mix joint compound and tape rolls, with the estimating assumptions stated.
Free tile calculator: area + tile size + waste percentage gives tiles to buy and boxes to order, for bathroom floors and walls. Grout guidance included, no sign-up.
Planificador de horas de estudio gratis: di tus horas semanales reales y las reparte entre asignaturas por créditos × dificultad, con horas, minutos y porcentaje por materia en una tabla editable.
Free study hours planner: give it your real weekly hours and it splits them across subjects by credits × difficulty — an editable table with hours, minutes and share per subject.
