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calculation

A calculation is a deliberate process that transforms one or more inputs into one or more results. The term is used in a variety of senses, from the very definite arithmetical calculation of using an algorithm, to the vague heuristics of calculating a strategy in a competition, or calculating the chance of a successful relationship between two people.
For example, multiplying 7 by 6 is a simple algorithmic calculation. Estimating the fair price for financial instruments using the Black–Scholes model is a more complex algorithmic calculation.
Statistical estimations of the likely election results from opinion polls also involve algorithmic calculations, but produces ranges of possibilities rather than exact answers.
To calculate means to determine mathematically in the case of a number or amount, or in the case of an abstract problem to deduce the answer using logic, reason or common sense. The English word derives from the Latin calculus, which originally meant a small stone in the gall-bladder (from Latin calx). It also meant a pebble used for calculating, or a small stone used as a counter in an abacus (Latin abacus, Greek abax). The abacus was an instrument used by Greeks and Romans for arithmetic calculations, preceding the slide-rule and the electronic calculator, and consisted of perforated pebbles sliding on iron bars.

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  1. T

    Rough calculation of system water content

    Pricing for a boiler change, custard thinking of going to a sealed system. Boiler that i'am pricing for will require an additional expansion vessel if system is over 100 litres (its 30cdi classic system) Its Fairly large property. 900x450 indirect cylinder on an S-plan with 11 rads Rads...
  2. L

    oil kw rating calculation

    I am struggling to get my head around the calculation for kw output of an oil boiler by using nozzle size and pump pressure information. if anyone has info regarding the calculation formula or a chart or an app or something enabling a quick on site calculation I would be grateful. the riello...
  3. J

    gas pipe sizing calculation work sheet

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  4. Riley

    Boiler Sizing Apps

    As the title says I'm just wondering if anyone has come across any apps that accurately deal with boiler sizing. Look forward to hearing from you. Cheers
  5. T

    Flueless gas fire min room size calculation, a little help please.

    Okay I am servicing a Burley esteem 4221 (lpg) this week and apparently it requires a min room size of 30cu3. evidently I am going to want to check this as part of the service. How do I check/calculate this? P.S yes I could go out to my van and get my gas book But I though Id ask here... and...
  6. M

    warm air heating

    Hi, Father in law just moved into new house. His heating bill has been estimated by previous occupant(the owner). Based on his gas consumption. THe landlord has had safety check carried out and passed 2 fires, the warm air and hot water. I told him I'd gas rate them, all is ok except the warm...
  7. B

    Pipe sizing calculation question

    Hello chaps, was hoping one or more of you can clarify a question re the above. When sizing pipework for an installation, I know that the Kw per appliance and the total Kw is used in the calculation,(plus the bearing in mind for future appliances etc) but in the case of a gas hob, for example a...
  8. S

    heat loss calculation

    Can any body recommend a good online heat loss calculator? A link will be must appreciated.
    • sasik
    • Thread
    • calculation calculator heat heat loss heatline online plumbing radiator
    • Replies: 5
    • Forum: Plumbing Jobs | The Job-board
  9. C

    Glycol Calculation

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  10. D

    Vent calculation !

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  11. B

    FGA calculation

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  12. R

    Gas Rate calculation question......

    Afternoon everyone, Im a touch confused at the moment. Being the sad man I am, I got home today and thought I would look at the Commissioning checklist in my boiler MIs from when we bought out house. So, I have a scan through it and come to the domestic hot water section and have a look at the...
  13. M

    BTU/KW Rating

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  14. L

    Deemed Heat Calculation and MCS/RHI for Solar Thermal

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  15. R

    Heating calculation for toilet in a basement

    I have been asked to install a heater in a currently unheated toilet situated in the basement of a commercial premises. Please check my calculations and assumptions, and give your thoughts on my proposed solution assumptions: room size = 1.5m long x 0.85m wide x 3m high U value = same for...
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  16. S

    Calculation for HEAT INPUT

    Hello. If i know the HEAT OUPUT of a gas fire for example how would i use this to calculate the heat INPUT of this appliance if the data badge is not available. what is the correct formula for example if my heat output on a fire is 7.5kw ? thanks
    • steve799
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