Mathematics category
Statistics calculators
Data summaries, uncertainty, measurement and practical quantitative models.
1288 calculators in this category. Page 21 of 27.
1288 calculators available. Search data loads only when you use this field.
Acoustic Band Edge Frequency Ratio
Calculate band-edge frequency ratio from upper band-edge frequency and lower band-edge frequency.
Open calculator StatisticsAcoustic Band Edge Frequency Ratio: solve upper band-edge frequency
Rearrange the acoustic band edge frequency ratio relationship and solve for upper band-edge frequency.
Open calculator StatisticsAcoustic Band Edge Frequency Ratio: solve lower band-edge frequency
Rearrange the acoustic band edge frequency ratio relationship and solve for lower band-edge frequency.
Open calculator StatisticsOccupational Noise Dose Percentage
Calculate noise dose percentage from accumulated weighted noise exposure and allowable weighted noise exposure.
Open calculator StatisticsOccupational Noise Dose Percentage: solve accumulated weighted noise exposure
Rearrange the occupational noise dose percentage relationship and solve for accumulated weighted noise exposure.
Open calculator StatisticsOccupational Noise Dose Percentage: solve allowable weighted noise exposure
Rearrange the occupational noise dose percentage relationship and solve for allowable weighted noise exposure.
Open calculator StatisticsSeismic P-to-S Wave Velocity Ratio
Calculate p-to-s velocity ratio from compressional p-wave speed and shear s-wave speed.
Open calculator StatisticsSeismic P-to-S Wave Velocity Ratio: solve compressional P-wave speed
Rearrange the seismic p-to-s wave velocity ratio relationship and solve for compressional p-wave speed.
Open calculator StatisticsSeismic P-to-S Wave Velocity Ratio: solve shear S-wave speed
Rearrange the seismic p-to-s wave velocity ratio relationship and solve for shear s-wave speed.
Open calculator StatisticsSeismic Resonance Quality Factor
Calculate seismic quality factor from resonance centre frequency and resonance bandwidth.
Open calculator StatisticsSeismic Resonance Quality Factor: solve resonance centre frequency
Rearrange the seismic resonance quality factor relationship and solve for resonance centre frequency.
Open calculator StatisticsSeismic Resonance Quality Factor: solve resonance bandwidth
Rearrange the seismic resonance quality factor relationship and solve for resonance bandwidth.
Open calculator StatisticsWastewater Hydraulic Surface Loading
Calculate hydraulic flow per surface area from wastewater volumetric flow rate and treatment surface area.
Open calculator StatisticsWastewater Hydraulic Surface Loading: solve wastewater volumetric flow rate
Rearrange the wastewater hydraulic surface loading relationship and solve for wastewater volumetric flow rate.
Open calculator StatisticsWastewater Hydraulic Surface Loading: solve treatment surface area
Rearrange the wastewater hydraulic surface loading relationship and solve for treatment surface area.
Open calculator StatisticsWastewater Organic Volumetric Loading
Calculate organic load per reactor volume and time from influent organic mass load per time and active reactor volume.
Open calculator StatisticsWastewater Organic Volumetric Loading: solve influent organic mass load per time
Rearrange the wastewater organic volumetric loading relationship and solve for influent organic mass load per time.
Open calculator StatisticsWastewater Organic Volumetric Loading: solve active reactor volume
Rearrange the wastewater organic volumetric loading relationship and solve for active reactor volume.
Open calculator StatisticsWastewater Treatment Removal Fraction
Calculate removed fraction from effluent constituent concentration and influent constituent concentration.
Open calculator StatisticsWastewater Treatment Removal Fraction: solve effluent constituent concentration
Rearrange the wastewater treatment removal fraction relationship and solve for effluent constituent concentration.
Open calculator StatisticsWastewater Treatment Removal Fraction: solve influent constituent concentration
Rearrange the wastewater treatment removal fraction relationship and solve for influent constituent concentration.
Open calculator StatisticsActivated-Sludge Food-to-Microorganism Ratio
Calculate food-to-microorganism loading rate from biodegradable substrate mass load per time and active biomass inventory.
Open calculator StatisticsActivated-Sludge Food-to-Microorganism Ratio: solve biodegradable substrate mass load per time
Rearrange the activated-sludge food-to-microorganism ratio relationship and solve for biodegradable substrate mass load per time.
Open calculator StatisticsActivated-Sludge Food-to-Microorganism Ratio: solve active biomass inventory
Rearrange the activated-sludge food-to-microorganism ratio relationship and solve for active biomass inventory.
Open calculator StatisticsWastewater Oxygen Transfer Efficiency
Calculate oxygen transfer efficiency percentage from oxygen mass transferred to liquid and oxygen mass supplied.
Open calculator StatisticsWastewater Oxygen Transfer Efficiency: solve oxygen mass transferred to liquid
Rearrange the wastewater oxygen transfer efficiency relationship and solve for oxygen mass transferred to liquid.
Open calculator StatisticsWastewater Oxygen Transfer Efficiency: solve oxygen mass supplied
Rearrange the wastewater oxygen transfer efficiency relationship and solve for oxygen mass supplied.
Open calculator StatisticsReturn Activated-Sludge Flow Ratio
Calculate return-flow percentage from return activated-sludge flow rate and influent wastewater flow rate.
Open calculator StatisticsReturn Activated-Sludge Flow Ratio: solve return activated-sludge flow rate
Rearrange the return activated-sludge flow ratio relationship and solve for return activated-sludge flow rate.
Open calculator StatisticsReturn Activated-Sludge Flow Ratio: solve influent wastewater flow rate
Rearrange the return activated-sludge flow ratio relationship and solve for influent wastewater flow rate.
Open calculator StatisticsWastewater Sludge Volume Index
Calculate settled volume per solids mass from settled sludge volume per sample volume and mixed-liquor suspended-solids concentration.
Open calculator StatisticsWastewater Sludge Volume Index: solve settled sludge volume per sample volume
Rearrange the wastewater sludge volume index relationship and solve for settled sludge volume per sample volume.
Open calculator StatisticsWastewater Sludge Volume Index: solve mixed-liquor suspended-solids concentration
Rearrange the wastewater sludge volume index relationship and solve for mixed-liquor suspended-solids concentration.
Open calculator StatisticsMembrane Bioreactor Permeate Flux
Calculate permeate flow per membrane area from permeate volumetric flow rate and active membrane area.
Open calculator StatisticsMembrane Bioreactor Permeate Flux: solve permeate volumetric flow rate
Rearrange the membrane bioreactor permeate flux relationship and solve for permeate volumetric flow rate.
Open calculator StatisticsMembrane Bioreactor Permeate Flux: solve active membrane area
Rearrange the membrane bioreactor permeate flux relationship and solve for active membrane area.
Open calculator StatisticsHVAC Outdoor-Air Fraction
Calculate outdoor-air percentage from outdoor-air volume flow and total supply-air volume flow.
Open calculator StatisticsHVAC Outdoor-Air Fraction: solve outdoor-air volume flow
Rearrange the hvac outdoor-air fraction relationship and solve for outdoor-air volume flow.
Open calculator StatisticsHVAC Outdoor-Air Fraction: solve total supply-air volume flow
Rearrange the hvac outdoor-air fraction relationship and solve for total supply-air volume flow.
Open calculator StatisticsHVAC Ventilation Airflow per Person
Calculate outdoor airflow per person from outdoor ventilation airflow and represented occupant count.
Open calculator StatisticsHVAC Ventilation Airflow per Person: solve outdoor ventilation airflow
Rearrange the hvac ventilation airflow per person relationship and solve for outdoor ventilation airflow.
Open calculator StatisticsHVAC Ventilation Airflow per Person: solve represented occupant count
Rearrange the hvac ventilation airflow per person relationship and solve for represented occupant count.
Open calculator StatisticsHVAC Cooling Load Density
Calculate cooling load per floor area from design sensible and latent cooling load and conditioned floor area.
Open calculator StatisticsHVAC Cooling Load Density: solve design sensible and latent cooling load
Rearrange the hvac cooling load density relationship and solve for design sensible and latent cooling load.
Open calculator StatisticsHVAC Cooling Load Density: solve conditioned floor area
Rearrange the hvac cooling load density relationship and solve for conditioned floor area.
Open calculator StatisticsHVAC Coefficient of Performance
Calculate coefficient of performance from useful heating or cooling rate and equipment input power.
Open calculator StatisticsHVAC Coefficient of Performance: solve useful heating or cooling rate
Rearrange the hvac coefficient of performance relationship and solve for useful heating or cooling rate.
Open calculator StatisticsHVAC Coefficient of Performance: solve equipment input power
Rearrange the hvac coefficient of performance relationship and solve for equipment input power.
Open calculator