01 / CALCULUS LODGE
A London Lodge that makes time for people.
Calculus Lodge No. 3575 meets on Saturdays at Freemasons’ Hall, Great Queen Street. We combine serious Freemasonry with a warm welcome, strong friendships and an active social life.
WHO WE ARE
Different backgrounds. Shared standards.
Our members come from different professions, generations and parts of the country. What brings us together is a belief in friendship, personal development, charity and treating people properly.
We welcome men aged 18 and over who are considering Freemasonry, as well as existing Freemasons looking for a London Lodge with convenient Saturday meetings.
WHY CALCULUS
The rhythm of Lodge life.
Saturday meetings
Our calendar works for members who travel, work long weekdays or want Freemasonry to fit comfortably around family life.
Ceremony with purpose
The ritual gives Lodge meetings structure and meaning. Members learn, participate and progress at a pace that suits them.
A proper Festive Board
The meal after the meeting is where conversation flows, friendships deepen and visitors discover the character of Calculus.
BEYOND THE LODGE ROOM
Family, friendship and charity.
Our social calendar includes members’ families and gives everyone time to know one another away from formal meetings. We also support charitable causes locally and through the wider Masonic community.
That balance matters. Freemasonry should add something worthwhile to your life—not compete with it.